physics
posted by #! .
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,
calculate
a) the work done by the force.
Answer in units of J
b) the coefficient of kinetic friction.

a) 142 x 6.00 = ___ joules
b) 142/(M*g) = 0.308