Cha 11: Torque and Angular Momentum

What is the condition for smooth rolling?

Smooth rolling occurs when the center of mass moves in a straight line and the object rotates around its center of mass without slipping.

What role does friction play in rolling motion?

Friction prevents slipping and produces rotation. Without friction, the object will slide instead of rolling.

Define torque in terms of force and distance.

Torque is the rotational effect of a force applied at a distance from the axis of rotation.

How is angular momentum (LLL) defined?

Angular momentum depends on the position vector, linear momentum, or rotational inertia and angular velocity.

Which gives the kinetic energy of an object rolling smoothly over a floor?

the sum of the translational kinetic energy and the rotational kinetic energy

Which describes the direction of a torque vector?

perpendicular to the plane formed by the position vector and the force vector

Which describes the direction of an angular momentum ?

perpendicular to the plane formed by the position vector and the momentum vector

How is torque related to angular momentum?

Torque is equal to the derivative of the angular momentum with respect to time.