Assignment:
An electric winch pulls a 30.9 kg case of soap up a roller incline 3.01 m high in 3.15 seconds. The case starts from rest at the bottom and is moving 4.02 m/s at the top of the incline. The force of friction on the box is 39.4 N.
a) What is the increase in gravitational potential energy of the box?
b) Calculate the length of the ramp based on the average velocity and time.
c) What is the work done by friction?
d) Use the work energy theorem to find the work done by the motor.
e) What is the average horsepower produced by the motor?