Question

1.)A force of 250 is just sufficient to start a 50 kg steel trunk moving across a wooden floor. Find the coefficient of static friction.

2.) compute the acceleration of the block sliding down a 30 deg inclined plane if the coefficient of kinetic friction is 0.20.

Answer 1

force friction=mg*mu
mu=250N/(50*9.8)

Answer 2

2. gravity force down the plane
mg*sin30


net force=m*acceleration
mg*sin30-mg*.2=ma
solve for acceleration a

Answer 3

Thank you :)