We can use 30kJ of work from a heavy-duty pushing robot that can apply different constant forces. We need to carry freights up a ramp of height 6ft, the freight-ramp coefficient of friction is 0.5.
(a) Draw a free-body diagram for the freight. Using this robot, how heavy a freight can we lift with ramp angles of
(b) 10 degrees and
(c) 30 degrees.