Q. A boy continuously applied 10 N force on a brick of mass 5 kg lying on a flat floor and it displaced to 8 m along the direction of force. If the frictional force experienced on the brick is 4 N, a). What is the work done by the boy?
b). Calculate the work done by the frictional force.
c). What is the work done against the gravity? (Take g = 10 m/s2 )