Relevant material from MIT's introductory courses to support students as they study and educators as they teach the AP Physics curriculum.
Solving problems is an essential part of the understanding process.
Motion in two dimensions with one dimensional acceleration (projectile) is analyzed with component motions in coordinate system, whereas motion in two dimensions with two dimensional acceleration (circular motion) is analyzed with the help of component accelerations - tangential and normal accelerations.
Solving problems is an essential part of the understanding process.
A planned approach to problems is essential to effectively apply laws of motion.
Analysis of resultant motion is best fit to the principle of independence of motion in mutually perpendicular directions.
Analyzing collision situation involves application of basic conservation principles in a closed system.
The angular momentum in rotation is a subset of angular momentum about a point in general motion.
Objective questions, contained in this module with hidden solutions, help improve understanding of the topics covered under the module "Angular momentum".
Angular quantities are not limited to rotation about fixed axis only.
Artificial satellites are the backbone of modern communication systems.
Resultant of a balanced force system is zero.
Solving problems is an essential part of the understanding process.
The EJS Baton Throw model displays a baton thrown up in the air about its center of mass. The baton is modeled by two masses separated by massless rigid rod. The path of the center of mass of the baton and the red mass are shown in black and red, respectively. The ratio of the two masses can be set via a slider and the initial velocity of the center of mass of the baton and the rotational velocity of the baton can be set via text boxes.
The EJS Car on an Inclined Plane model displays a car on an incline plane. When the car reaches the bottom of the incline, it can be set to bounce (elastic collision) with the stop attached to the bottom of the incline. The car consists of the car body, two rotating front wheels, and two rotating rear wheels. The incline angle (in radians) can be changed via a textbox. In addition the car can be dragged to its initial position.
There is a characteristic geometric point of the three dimensional body in motion, which behaves yet as a particle.
Under certain condition, COM of rigid bodies is same as geometric center.
Objective questions, contained in this module with hidden solutions, help improve understanding of the topics covered in the modules "Center of mass" and "Center of mass and rigid bodies".
This simulation represents the case of an object sliding frictionless over the surface of a flat disk that is rotating. I will call the object 'the puck', as in ice hockey. The 'Distance' in the simulation is the distance to the disk's rotation axis. The 'Velocity' is relative to the disk; 0.3 velocity means that at the instant of being launched the puck's velocity relative to the disk is 30% of its co-rotating velocity at that particular distance to the rotation axis. That is, close to the rotation axis 0.3 represents a slower velocity than close to the disk's rim.
The disk supports the weight of the puck, but since there is no friction the rotation of the disk does not affect the motion of the puck. So there's no dynamics going on; there is no exchange of momentum, no change of kinetic energy.
Solving problems is an essential part of the understanding process.
