All Flashcards
What is Rotational Kinetic Energy?
Energy an object possesses due to its rotation.
Define Rotational Inertia (I).
How hard it is to change an object's rotation.
Define Angular Velocity (ω).
How fast an object is spinning.
What is a rigid system?
A system where the distance between any two points remains constant.
What is Translational Kinetic Energy?
Energy an object possesses due to the motion of its center of mass.
What are the differences between rotational and translational kinetic energy?
Rotational: Energy due to rotation, depends on moment of inertia and angular velocity. Translational: Energy due to linear motion, depends on mass and linear velocity.
What are the differences between scalar and vector quantities?
Scalar: Magnitude only (e.g., rotational kinetic energy). Vector: Magnitude and direction (e.g., angular velocity, angular momentum).
What are the differences between moment of inertia for a solid sphere and a hollow sphere?
Solid Sphere: (mass concentrated closer to the center). Hollow Sphere: (mass distributed further from the center).
What are the differences between rolling with slipping and rolling without slipping?
Rolling without slipping: (linear and angular velocities are related). Rolling with slipping: (linear and angular velocities are independent).
What are the differences between angular momentum and rotational kinetic energy?
Angular Momentum: Vector quantity, measures the quantity of rotation. Rotational Kinetic Energy: Scalar quantity, measures the energy of rotation.
What is the difference between Rotational and Translational Kinetic Energy?
Rotational KE: Energy from spinning | Translational KE: Energy from movement of center of mass.
Compare scalar and vector quantities.
Scalar: Magnitude only | Vector: Magnitude and direction.