Question

Asked Oct 28, 2019

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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?

Step 1

**Given:**

Displacement of the cart = 21.5 m

Friction force = 45 N

Direction of the force = 27.5° below the horizontal

Step 2

(a) Calculating the work done on the car by friction:

Step 3

(b) Calculating the magnitude of force th...

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