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fixedglare

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## Homework Statement

a person uses a cord to pull a boat of 1000 kg along 50 meters. The cord makes a 45° angle. If the applied work to the boat is 40 N, how much work is done?

Given:

mass = 1000 kg

displacement = 50 meters

the angle = 45°

applied work = 40 N

## Homework Equations

Work = Fd

Weight = mg

Work = Fd cos θ

## The Attempt at a Solution

First I converted the mass to weight:

1000 kg/ 9.81 m/s = 101.9 N

Then I added that to the other force so, 101.9 N + 40.0 N = 141.9 N. *I don't know if I should add or subtract*

Then I used the W = Fd cos θ equation:

W = (141.9 N * 50 m)(cos 45°) =

5016.9 JIs this correct?

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