10 An electric winch lifts an object of weight 60.0 N through a distance of 12.0 m a) How much potential energy is gained by the object? b) The 125 W electric winch takes 8.00 s to lift the object. How much electrical energy is used? c) Hence calculate the percentage efficiency of the winch d) If the winch operates on a 50.0 V supply what is the current in the winch motor? e) Calculate the power wasted. Assuming the only loss in the system is caused by electrical heating within the motor and treating this heating as arising due to current flow through an Ohmic resistance calculate the resistance of the motor coil.