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).
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.
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.
