Question

Two blocks (with masses 20.5 kg and 68 kg)
are connected by a string as shown. The pulley is frictionless and of negligible mass. The
coefficient of kinetic friction between block
and machine is 0.257.

Find the change in the kinetic energy of the
block on the incline as it moves a distance of
15.4 m up the incline if the system starts from
rest.

Answer 1

first, I have to set up equation for sum of force, find net force, then multiply it by the distance, right?

Answer 2

Oops wrong category.