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7.4 Exercise 30

Avg difficulty 2.5

A boy pulls a 5-kg cart with a 20-N force at an angle of 30°30 ° above the horizontal for a length of time. Over this time frame, the cart moves a distance of 12 m on the horizontal floor. (a) Find the work done on the cart by the boy. (b) What will be the work done by the boy if he pulled with the same force horizontally instead of at an angle of 30°30 ° above the horizontal over the same distance?

OpenStax University Physics Volume 1, 7.4 Power, exercise 30

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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.