## ....General Physics I...YouTube Videos: Motion, Vectors, Newton's Laws, Conservation Laws, Thermodynamics, Waves

[Introduction]   [Motion]   [Projectile Motion]   [Vectors]

[Newton's Laws]   [Friction]   [Circular Motion]   [Gravity]

[Conservation of Energy]   [Conservation of Momentum, Collisions]   [Statics, Torque]

[Rotation Kinematics and Dynamics]   [Fluids]   [Temperature, Ideal Gas, Expansion]

[Heat, Thermodynamics, Heat Engines]   [Simple Harmonic Motion]   [Sound]

 Motion Distance Displacement Scalar Vector Lecture (11 minutes) This video starts the discussion of Chapter 2 of OpenStax College Physics. The terms distance, displacement, scalar, and vector are briefly discussed. Speed, Velocity, Kinematics Lecture (8 minutes) This video discusses speed and velocity. The material is based on chapter 2 of OpenStax College Physics. Acceleration, Kinematics Lecture (9 minutes) This video discusses the definition and meaning of acceleration. This material relates to Chapter 2 of OpenStax College Physics. Kinematic Equations Constant Acceleration One Dimension Lecture (7 minutes) This video derives the four kinematic equations for constant acceleration in one dimension. This material relates to Chapter 2 of OpenStax College Physics. Concepts Related to Kinematic Equations Concepts (9 minutes) This video discusses concepts related to Kinematic Equations. Topics discussed are: displacement vs. distance; distance = rate times time; constant acceleration required; selection of value for starting position; acceleration due to gravity for object at top of its vertical motion. Motion Graphs ... Position, Velocity, Acceleration Example (5 minutes) This video presents two graphs of position vs. time. The value of the slope of the line on the position graph is used to produce the velocity graph. The slope of the line on the velocity graph is used to produce the acceleration graph. This material relates to Chapter 2 of OpenStax College Physics. Kinematic Equations Constant Acceleration Examples Lecture and Examples (13 minutes) This video discusses the four kinematic equations that apply when the acceleration is constant. Some concepts and some specific examples are discussed. This material relates to Chapter 2 of OpenStax College Physics. One Dimension Kinematics, Race Car Acceleration Example (5 minutes) A race car starts from rest and achieves a velocity of 250 miles per hour after traveling one-eighth of a mile. Assume the acceleration is constant. Determine the acceleration value. Kinematics, Car Catches Up With Truck Example (15 minutes) This example uses the kinematic equations to calculate how much time is required for one vehicle to catch up with another vehicle for the situation where the second vehicle had a higher initial speed but only the first vehicle accelerates. The first vehicle accelerates after a few seconds. Two Cars Traveling in same Direction-One Has Higher Speed Example (5 minutes)Two cars are traveling in the same lane on a highway. The car in front is traveling slower than the car that is behind. This video calculates the time for the trailing car to catch the front car for two different speeds of the leading car. Two Cars Side By Side-One Has Constant Speed-One Accelerates Example (13 minutes)In this video two cars are side-by-side at time = 0 seconds. One car is moving at a constant speed. The other car starts from rest and accelerates. The video shows how to calculate the time until the cars are side-by-side again. Kinematics, Ball Leaves Helicopter Example (14 minutes) In this kinematics problem a ball and helicopter are moving upward. At a certain height above the ground the ball rolls out of the helicopter. The maximum height of the ball and the time to hit the ground are calculated. Kinematics, Two Objects Approaching Example (11 minutes) In this kinematics example two objects are approaching each other with different speeds. One object experiences friction and is slowing down. The time of the collision is calculated and the distance each object moves is calculated. Kinematics, Airplane Takeoff Acceleration and Runway Length Example (5 minutes) On a day when the wind speed is zero a plane starts from rest and lifts off after 38 seconds of constant acceleration. The airspeed required for lift off is 150 mph. The acceleration and minimum required length for the runway are calculated. Kinematics, Minimum Length of Runway for Plane Taking Off Into Wind and With Wind Example (6 minutes) An airplane starts form rest on a straight runway. There is a 30 mph wind parallel to the runway. The plane accelerates uniformly at 1.6 m/s2. The airspeed at lift off is 160 mph. The required length for the runway is calculated for the case that the plane takes off into the wind and for the case that the plane takes off while moving in the same direction as the wind. Car Constant Acceleration for Given Distance and Time Example (8 minutes) A car starts from rest and has constant acceleration. The elapsed time and distance traveled in a straight line are give. The final speed and acceleration are determined. A brief discussion is given on average velocity and distance traveled for half of the elapsed time. Vertical Motion Free Fall Lecture (8 minutes) This video discusses the concepts for vertical motion for which air resistance can be ignored. One example is worked in the video. This material relates to Chapter 2 of OpenStax College Physics. Vertical Motion of a Ball (Example 7 minutes) A ball is launched verticallly from ground level. The maximum height, time to move upward, time to fall back to the ground, and speed just before impact are determined. . Return to the top of this page. ... OR ... Return to physics.gpclements.com
 Projectile Motion Projectile Motion Lecture (14 minutes) This video briefly describes the concepts and solution methods for projectile motion problems. This material relates to Chapter 3 of OpenStax College Physics. Concepts for Motion in Two Dimensions, Vectors Concepts (5 minutes) This video discusses concepts for vectors and projectile motion (i.e. motion in two dimensions). Projectile Motion Example Example (6 minutes) This video shows how to calculate horizontal and vertical components for an object that is launched with a given speed and direction. The video provides a step by step solution to finding the range for the object. The time to the maximum height of the motion is used to find the time in the air. This material relates to chapter 3 of OpenStax College Physics. Projectile Motion Baseball 1 (Example 14 minutes) In this problem a baseball is struck by a bat at a given distance above home plate. The ball leaves the bat at a given angle. The ball crosses the outfield fence at a given height and the distance to the fence is given. The time for the ball to travel to the fence and the initial velocity of the ball are determined. Air resistance is ignored. Projectile Motion Baseball 2 Speed, Angle Unknown (Example 11 minutes) In this problem a baseball is struck by a bat at a given distance above home plate. The ball crosses the outfield fence at a given height and the distance to the fence is given. The time for the ball to travel to the fence is given. The initial velocity (magnitude and angle) of the ball are determined. Air resistance is ignored. Projectile Motion Calculate Launch Angle Max Height Time (Example 15 minutes) A ball is launched at a given speed at an unknown angle. The range of motion is given. The ball lands at the same height it was launched. Projectile Motion Dart and Apple 1 aka Hunter and Monkey (Example 9 minutes)A dart gun is aimed at an apple hanging in a tree. The dart is launched at 16 m/s at an angle of 30 degrees. The dart gun is 1.3 meters above the ground. The apple is 5.6 meters above the ground. Does the dart hit the apple? Projectile Motion General Dart and Apple 2 aka Hunter and Monkey (Example 11 minutes) A dart gun is aimed at an apple in a tree. When the dart is fired the apple starts falling to the ground. This video gives a general proof that the dart will hit the apple regardless of the speed of the dart. Projectile Motion Dart and Apple 3 Hit Ground Together aka Hunter and Monkey (Example 11 minutes) A dart gun is aimed at an apple hanging in a tree. The dart is launched at an angle of 30 degrees. The dart gun is 1.3 meters above the ground. The apple is 5.6 meters above the ground. Determine the launch speed for the dart such that the dart hits the apple at the instant the apple hits the ground. Projectile Motion, Ball Launched from Cliff; Distance, Time In Air, Given Example (11 minutes) In This projectile motion a ball is thrown from a cliff with a known height. The horizontal distance traveled and the time in the air are given. The launch angle and speed are determined. Projectile Motion, Basketball Shot Example (8 minutes) This video shows how to calculate the initial speed of a basketball that is launched at a given angle, from a given height above the floor, and given the height of the basketball goal. Air resistance is ignored. The horizontal and vertical equations are used to solve for the launch speed. The maximum height of the basketball is also calculated. Projectile Motion Example, Height, Time in the Air, Range Example (7 minutes) In this projectile motion example the launch velocity is given. The maximum height, the time in the air, and the range are calculated. Air resistance is ignored. The ball is launched over level ground. Projectile Motion, Two Balls Collide in the Air, Max Height, Time Example (9 minutes) In this projectile motion example one ball is launched with a given speed and angle. The second ball is launched straight upward at a given speed. The video shows how to calculate the time delay between the launch of ball 1 and ball 2 such that the balls hit at the maximum height of ball 1. This is not a momentum problem, it is a kinematics problem. Air resistance is ignored. . Return to the top of this page. ... OR ... Return to physics.gpclements.com
 Vectors Vector Addition Using the Graphical Method Lecture (16 minutes) This video starts the discussion of Two Dimensional Motion. The video shows how to add vectors using the graphical, head-to-tail, method. This material relates to Chapter 3 of OpenStax College Physics. Trig Functions Review and Analytic Addition of Vectors Lecture (18 minutes) This video has a quick review of right triangles and trig functions. Then the video discusses how to add vectors analytically. The analytic addition of vectors produces more accurate results than the graphical addition of vectors. This material relates to Chapter 3 of OpenStax College Physics. Vector Addition Real World Problems Example (7 minutes) This video discusses rowing a boat across a river, and flying a plane when there is a wind. Vector addition is used to solve each problem. This material relates to Chapter 3 of OpenStax College Physics. Vector Addition, Drone, Three Vectors Example (17 minutes) This video shows how to calculate the distance traveled and displacement for a drone that has 3 segments of motion. The length and angle referenced to NSEW are given. The components of the vectors are calculated and added. The resultant vector is determined ... Return to the top of this page. ... OR ... Return to physics.gpclements.com
 Newton's Laws Introduction to Force and Newton's Laws Lecture (10 minutes) This video introduces the concept of force and Newton's Laws. Newton's three laws of motion are listed. Free body diagrams are described. This material relates to Chapter 4 of OpenStax College Physics. Netwon's Law F = ma Lecture (15 minutes) This video reviews terminology involved in F=ma. The video shows examples of applying F=ma. Acceleration is calculated based on given force and mass values. This material relates to Chapter 4 of OpenStax College Physics. Newton's Third Law and F=ma Examples Lecture and Examples (17 minutes) This video reviews Newton's Three Laws and then expands the discussion of Newton's Third Law. The video also has two examples of problem solving with F=ma. One problem involves an elevator. The second problem has two masses connected by a string on a horizontal, frictionless, surface. This material relates to Chapter 4 of OpenStax College Physics. Forces Problem Solving and Four Fundamental Forces Example and Lecture (7 minutes) This video gives some general guidance on solving problems using F=ma. The video briefly discusses the four fundamental forces: electrical, gravity, strong nuclear, and weak nuclear. This material relates to Chapter 4 of OpenStax College Physics. F=ma Elevator Problem Example (4 minutes) This video shows how to solve for the contact force acting on a person's feet in an elevator. The force is calculated for velocity=0, constant velocity and two values of acceleration of the person in the elevator. This material relates to Chapter 4 of OpenStax College Physics. F=ma Atwood Machine Acceleration and Tension Example (7 minutes) This video calculates the acceleration and tension in a connecting string for an Atwood's Machine problem. This material relates to Chapter 4 of OpenStax College Physics. Newton's Second Law F ma Three Objects, Tension (Example 11 minutes) A 12 kg object hangs freely from a string that is connected to a 9 kg object that rests on a horizontal table. A string connects the 9 kg object to a 5 kg object on the table. The coefficient of static friction is 0.26 and the coefficient of kiinetic friction is 0.17. The system starts at rest. Determine 1) if the system moves, 2) the acceleration, 3) the tension in the strings. F=ma Inclined Plane No Friction Example (7 minutes) This video calculates the acceleration of an object that is released form rest on a frictionless inclined plane. The time required for the object to reach the bottom of the ramp is determined. This material relates to Chapter 4 of OpenStax College Physics. Motion on Inclined Plane, Acceleration, Time, No Friction Example (6 minutes) This video shows how to calculate the acceleration of an object on an inclined plane. The time required to move a given distance is also determined. Friction is ignored. The Free Body diagram is shown. Force Equilibrium, Ramp, Tension in Rope, No Friction Example (6 minutes) A box is at rest on a ramp. A rope pulls on the box in an upward direction not parallel to the ramp. The tension in the rope is determined. Friction is ignored Bouncing Ball Average Force Example (7 minutes) A ball is dropped 4 meters onto a floor. After the partially elastic collision the ball reaches a height of 2.5 meters. The duration of the collision is 0.08 seconds. The average force of the collision is determined using two methods. Apollo Saturn V Launch Acceleration, Kinematics Example (7 minutes) This video calculates the acceleration of the Apollo Saturn V rocket at the time of launch. The velocity and distance traveled after 10 seconds are approximately determined. I assume constant acceleration just for a quick calculation. This ignores the change in mass of the system as it moves upward. Apollo Lunar Lander Acceleration, Throttle Control Example (11 minutes) This video calculates the acceleration of the Lunar Lander at the start of the de-orbit burn and near the lunar surface both for landing and take-off. The mass of the LEM near the surface of the Moon is estimated. The throttle setting % that would make the LEM hover is approximately calculated. Model Rocket-Speed-Height-Physics Example Problem Example (17 minutes)This physics educational video shows how to calculate the speed and height of a model rocket given the rocket mass, thrust of the rocket, and time the thrust is active. The mass of the rocket is assumed to be constant so the calculated acceleration will be constant and Calculus tools are not required. The launch occurs at the surface of the Earth. Air resistance is important in an actual launch but it is ignored for this calculation. Object Falls and is Pushed Horizontally-Find Velocity at Impact on the Ground Example (13 minutes)In this educational physics video a block of wood is released from rest. It falls towards Earth and at the same time is pushed horizontally by a model rocket engine. The velocity (speed and direction) at impact with the ground is calculated. Problem- solving principles for physics problems are emphasized. ... Return to the top of this page. ... OR ... Return to physics.gpclements.com
 Friction Friction and Force from Springs Lecture (8 minutes) This video gives a brief introduction to the concept of friction. Static and Kinetic friction is discussed. The equations used to calculate the force of friction are presented. There is a brief comment on the force due to springs. This material relates to Chapter 5 of OpenStax College Physics. F=ma for System of 4 Objects, Friction, Acceleration, Tension Example (17 minutes) This video analyses the motion of a system which has three objects on a table and one object hanging freely. Massless strings connect the objects. Friction is present for the objects on the table. The video shows how to determine if the system will start moving, calculates the acceleration, and calculates the tension in each string. The concept of an external force is emphasized. F=ma Object on Inclined Plane with Friction Example (14 minutes) This video calculates the acceleration for a system that includes a mass on an inclined plane, friction, and a second object hanging at the end of a rope that connects the objects. The video discusses the analysis of forces, static and kinetic friction, internal and external forces. F ma Two Objects Connected by String with a Plane and Friction Example (9 minutes) Two objects are connected by a massless string. One object rests on a plane. The other object hangs freely from the string. Friction is present. Does the system move? What is the acceleraton? What is the value of the tension in the string? Force Equilibrium, Ramp, Box, Rope, Friction Example (10 minutes) A box is at rest on a ramp. Friction is present. The video shows how to determine if the box slides down the ramp. Then we consider the effect of a rope pulling on the box up the ramp. The tension in the rope is determined such that the box is in equilibrium. The rope's effect on the normal force is taken into account. Object Pushed on Horizontal Surface, Then Slides Up Ramp With Friction Example (10 minutes) An object is pushed by a constant force for a given distance on a horizontal, frictionless surface. The velocity is determined. Then the object slides up an inclined plane that does have friction. The distance the object moves up the incline before coming to rest is determined. ... Return to the top of this page. ... OR ... Return to physics.gpclements.com
 Circular Motion Circular Motion and Introduction to Centripetal Acceleration Lecture (13 minutes) This video introduces the basic formulas of circular motion: S = r * angle and V = r * angular velocity. The video discusses the radian and the conversion of degrees to radians. The direction of centripetal acceleration is discussed. This material relates to Chapter 6 of OpenStax College Physics. Centripetal Force and Centrifugal "Force" Introduction Lecture (12 minutes) This video discusses the direction of centripetal force and its relation to the mass, velocity, and radius of the circle. The motion of cars traveling around corners and the centrifuge are discussed.Prof. The concept of Centrifugal and observations in non-inertial reference frames is briefly discussed. The Coriolis effect is discussed. This material relates to Chapter 6 of OpenStax College Physics. Centripetal Force, Speed of Object Moving in a Circle, String Provides Fc Example (5 minutes) This video calculates the speed of an object moving in uniform circular motion. The object is moving in a horizontal circle. A string connects the object to a weight which provides the centripetal force. Centripetal Acceleration and Force Hard Drive and Car Around Corner Examples (7 minutes) This video calculates the centripetal acceleration for a computer hard drive. The video also calculates the maximum speed a car could have to safely drive around a corner given conditions for friction and radius of the corner. This video relates to Chapter 6 of OpenStax College Physics. Centripetal Force, Safe Speed for Car Driving Around a Curve Example (7 minutes) This video calculates the maximum safe speed for a car that is driving around a curve on a flat highway (no banking). Static friction provides the centripetal force. The mass of the car does not affect the calculation of the safe speed. Centripetal Force, Find Angle for Banked Curve, No Friction (Example 9 minutes) A banked curve is being desgined to allow cars to travel safely around the curve at 50 mph. The radius of the circle is 230 meters. Determine the angle of the banking. Assume 0 friction. Uniform Circular Motion Ferris Wheel Normal Force (Example 7 minutes) A person is riding on a Ferris Wheel in uniform circular motion. The mass of the person, the diameter of the Ferris Wheel, and the time for one revolution are given. The value of the normal force at the top and bottom of the ride are determined. Centripetal Force Ferris Wheel Example (6 minutes) This video uses the concept of centripetal force to calculate the force the seat of the Ferris wheel applies to the person on the seat. This video relates to Chapter 6 of OpenStax College Physics. Centripetal Acceleration Truck Tire Tread Example (9 minutes) The tread of truck tires can separate from the underlying layers and leave debris on the side of highways. This video calculates the centripetal acceleration and force for the case of a truck moving at 65 mph. Centripetal Force, Angular Momentum, Earth's Orbit With Reduced Mass for Sun Example (9 minutes) This video calculates the change in the velocity of the Earth and the radius for the Earth's orbit if the Sun's mass is reduced by 50%. It is assumed the orbit is circular. The force of gravity provides the centripetal force. The angular momentum of the Earth is constant. This assumes (INCORRECTLY) that the orbit of the Earth is cicular before and after the Sun's mass is reduced. ... Return to the top of this page. ... OR ... Return to physics.gpclements.com