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.
How do you determine work done from a torque-angle graph?
Calculate the area under the curve of the graph.
How do you determine the sign of work done by torque?
If torque and angular displacement are in the same direction, work is positive. If they are in opposite directions, work is negative.