All Flashcards
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 are the key differences between work in linear motion and work in rotational motion?
Linear motion: Work is done by a force over a linear displacement. Rotational motion: Work is done by a torque over an angular displacement. The equations are and respectively.
Compare and contrast torque and force.
Force: A linear push or pull. Torque: A rotational force that causes an object to rotate. Both can do work.
Differentiate between angular displacement and linear displacement.
Angular displacement: The angle through which an object rotates. Linear displacement: The distance an object moves in a straight line.
How does moment of inertia relate to mass?
Mass: Resistance to linear acceleration. Moment of inertia: Resistance to angular acceleration. Moment of inertia depends on the mass distribution relative to the axis of rotation.
What is the difference between angular velocity and angular acceleration?
Angular velocity: The rate of change of angular displacement. Angular acceleration: The rate of change of angular velocity.
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).