posted by Kellie .
Suppose you carry a bag of groceries weighing 127 N from your car to your kitchen, a distance of 48 m, without raising or lowering the bag.
(a) What is the work done by the force you exert on the bag?
The force you exert on the bag is equal and opposite to the weight force. The motion is in a perpendicular direction.
When force and motion are in perpendicular directions, the work done is zero.