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?

W = work = unknown

F = force = 700 N

d = displacement = 0.45 m

W = F*d

W = (700 N)*(0.45 m)

W = (700*0.45) Nm

W = 315 Nm

W = 315 J

notes:

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it