posted by Akkie on .
you draw a 100kg sack of maize meal across the floor of a warehouse for the distance of 10m. You apply a force of 300N, directed at an angle of 30 degree to the floor.
a) If the floor is frictionless, how much work do you do on the bag?
b) If the coefficient of friction between the sack and the bag is 0.20, how much work is done on the sack?
c) If the sack starts from rest, what its kinetic energy at the end of the 10m in case b?