posted by #! on .
A horizontal force of 142 N is used to push a
47.0 kg packing crate a distance of 6.00 m on
a rough horizontal surface.
The acceleration of gravity is 9.81 m/s2 .
If the crate moves with constant velocity,
a) the work done by the force.
Answer in units of J
b) the coefficient of kinetic friction.
Why post the same question twice?