(Option C) The car is stopped on a hill. When a car is stopped on a hill, a net force is acting on the car due to gravity.
When a car is stopped on a hill, it is experiencing a net force due to gravity. This force is the result of the downward pull of gravity and the car's brakes, which counteract the gravity and keep the car from rolling down the hill. The car is essentially in a state of equilibrium since the opposing forces of gravity and the brakes are equal and opposite, meaning the net force on the car is zero. However, if the brakes were to suddenly fail, then the net force on the car would be the downward pull of gravity, causing the car to roll down the hill.
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