Question

Work Calculations

1. When doing a push up a student uses 700 N of force to lift his body a distance of 0.45m, how much work is done?

Answer 1

Answer: 315 joules

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W = work = unknown

F = force = 700 N

d = displacement = 0.45 m

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W = F*d

W = (700 N)*(0.45 m)

W = (700*0.45) Nm

W = 315 Nm

W = 315 J

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notes:

• Nm stands for "newton meters" and not "nanometers"
• 1 joule = 1 newton meter