SECTION 7.2 Work Done by a Constant Force1. A shopper in a supermarket pushes a cart with aBlG force of 35.0 N directed at an angle of 25.0° belowthe horizontal. The force is just sufficient to bal-ance various friction forces, so the cart moves at con-stant speed. (a) Find the work done by the shopperon the cart as she moves down a 50.0-m-long aisle.(b) The shopper goes down the next aisle, pushing hori-zontally and maintaining the same speed as before.If the friction force doesn't change, would the shopper'sapplied force be larger, smaller, or the same? (c) Whatabout the work done on the cart by the shopper?2. The record number of boat lifts, including the boat and

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