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7.4 Exercise 22

Avg difficulty 2.5

A girl pulls her 15-kg wagon along a flat sidewalk by applying a 10-N force at 37°37 ° to the horizontal. Assume that friction is negligible and that the wagon starts from rest. (a) How much work does the girl do on the wagon in the first 2.0 s. (b) How much instantaneous power does she exert at t=2.0st = 2.0 \text{s}?

OpenStax University Physics Volume 1, 7.4 Power, exercise 22

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Adapted from University Physics Volume 1 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 1. Imported at revision db44eb9.