All Flashcards
What is the effect of applying a torque to a stationary object?
It causes the object to undergo angular acceleration, initiating or changing its rotational motion.
What happens when positive work is done by a torque on a rotating object?
The rotational kinetic energy of the object increases, causing it to speed up.
What is the effect of negative work done by a torque on a rotating object?
The rotational kinetic energy of the object decreases, causing it to slow down.
What happens when the net torque on an object is zero?
The object's angular velocity remains constant (it either remains at rest or continues rotating at a constant rate).
What is the result of increasing the moment of inertia of an object while applying the same torque?
The angular acceleration of the object decreases.
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).