httpsgyazocome12425d2ec3f86866422fed39c7a0179 Question in sc

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Question in screenshot.

I don\'t know what the problem is?

Solution

Work done is the magnitude of the force (60) times the displacement (100) times the cosine of the angle between them (45°):

Work = Force x Displacement x Cos

W = 60lb x 100 ft x Cos 45°

W= 60 * 100 * cos(45°)

= 6000*(1/sqrt(2))

= 4242.64 ft-pounds