All Flashcards
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.
What is the effect of applying a torque in the same direction as the angular displacement?
Energy is transferred into the system, increasing its rotational kinetic energy.
What is the effect of applying a torque in the opposite direction as the angular displacement?
Energy is transferred out of the system, decreasing its rotational kinetic energy.
What happens to the work done if you double the torque?
The work done is doubled.
What happens to the work done if you double the angular displacement?
The work done is doubled.