1. Chapter 8 Rotational Equilibrium and Dynamics
pgs

2. Objectives Distinguish between torque and force.
Calculate the magnitude of a torque on an object.

3. Torque Rotational and translational (linear) motion can be separated.
Torque is a quantity that measures the ability of a force to rotate an object around some axis

4. Torque
Torque depends on a force and a lever arm

5. τ = Fd Torque Torque equals force times distance
Torque has units of N•m

6. Torque
Torque also depends on the angle between a force and a lever arm

7. τ = Fd (sin θ) Torque Torque is a vector quantity
Can be positive or negative

8. Torque
τnet = τ1 + τ2 + τ3…

9. Find the magnitude of the torque produced by a 5
Find the magnitude of the torque produced by a 5.0 N force applied to a door at a perpendicular distance of 0.25 m from the hinge.