Question: A shopper in a supermarket pushes a cart with a force of 39.0 N directed at an angle of 25.0° below the horizontal. The force is just sufficient to balance various friction forces, so the cart moves at constant speed.
Part A: Find the work done by the shopper on the cart as she moves down a 52.6-m-long aisle.
Please explain each step to determine the work done by the shopper on the cart.