## Conceptual Physics (12th Edition)

Published by Addison-Wesley

# Chapter 8 - Think and Solve: 45

#### Answer

a. Torque = (force)(lever arm). Torque =$(80 N)(0.25 m) = 20 N \cdot m$. b. The torque is the same. Torque =$(F) (0.10 m) = 20 N \cdot m$. Solve for F = 200 N. c. Yes, the torque calculations assume that you are pushing perpendicular to the wrench handle, so that the quoted distances are the lever arms.

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