All Flashcards
Compare positive and negative work done by torque.
Positive work: Energy transferred into the system, speeds it up. Negative work: Energy transferred out of the system, slows it down.
What is torque?
The rotational equivalent of force; what causes an object to rotate.
What is angular displacement?
How much an object has rotated, measured in radians.
Define work done by a torque.
The energy transferred when a torque acts over an angular displacement.
What are the units for torque?
Newton-meters (N⋅m).
What are the units for angular displacement?
Radians (rad).
What is torque?
Torque is a rotational force that can transfer energy to or from an object when applied over an angular displacement.
Define angular displacement.
Angular displacement is the angle through which an object rotates.
What is work in the context of rotational motion?
Work in rotational motion is the energy transferred by a torque acting over an angular displacement.
Define moment of inertia.
Moment of inertia is a measure of an object's resistance to changes in its rotational motion.
What is rotational kinetic energy?
Rotational kinetic energy is the kinetic energy due to the rotation of an object and is given by , where I is the moment of inertia and is the angular velocity.