A person pulls a loaded sled of mass m= 75 kg along a horizontal surface at constant velocity. Find the force exerted by the person.
Find the net work done if the sled is pulled 10 m
Lets start with the equation to find force. Force is equal to the mass times the acceleration. Since the velocity is constant, the acceleration is equal to 0 so we have this equation.
F = m * a
F = (75kg) * (0 m/s^s) = 0
So the force exerted by the person is 0 N
So let's move to work. Work is equal to force times the displacement.
W = F * d
We use the force that we got in the first problem and displacement is given.
W = (0 N) * (10 m) = 0 J
So the answer to both problems is 0 :)
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