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PhysicsQ&A LibraryA shopper pushes a grocery cart for a distance 21.5 m at a constant speed on level ground, against a 45 N frictional force. He pushes in a direction 27.5° below the horizontal. a.) What is the work done on the cart by friction, in joules? b.) Find the magnitude of the force, in newtons, that the shopper exerts on the cart. c.) What is the total work done on the cart, in joules?Question

A shopper pushes a grocery cart for a distance 21.5 m at a constant speed on level ground, against a 45 N frictional force. He pushes in a direction 27.5° below the horizontal.

**a.) **What is the work done on the cart by friction, in joules?

**b.) **Find the magnitude of the force, in newtons, that the shopper exerts on the cart.

**c.) **What is the total work done on the cart, in joules?

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