A body of mass 60 kg is pushed up with just enough force to start it moving on a rough surface with mu_(s)=0.5 and mu_(k)=0.4 and the force continues to act afterwards. What is the acceleration of the body ?

A body of mass 60 kg is pushed up with just enough force to start it m

1.	A body of mass 60 kg is pushed up with just enough force to start it moving on a rough surface with mu_(s)=0.5 and mu_(k)=0.4 and the force continues to act afterwards. What is the acceleration of the body ?
Answer» Solution :`m=60 kg , mu_(s)=0.5, mu_(K)=0.4` Force `f =ma=m(mu_(s)-mu_(k))G` `THEREFORE a=(mu_(s)-mu_(k))g` `= (0.5-0.4)9.8=0.98 m//s^(2)`