weight = m g
friction force = mu m g
so
static mus
75 = mus (20)(9.81)
and
kinetic muk
60 = muk (20)(9.81)
A 20kg block is initially at rest on a rough, horizontal surface. A horizontal force of 75N is required to set the block in motion. After it is in motion, a horizontal force of 60N is required to keep the block moving with constant speed.
Find the coefficient of static and kinetic friction from this information.
1 answer
1 answer