Question

For each of the following, state whether the work done on the object by the force is positive or negative a. the force of friction exerted by the road on a car b. the force used to lift a bucket c. the force of air slowing a parachute

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a) The answer that should go on a blank line is negative\boxed{\text{negative}}. The force is negative because a car is moving in front and the force of friction is resisting to that force.

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