When you step on the gas in your car, the wheels push against the ground and the ground pushes back. The force which makes the car accelerate is exerted by

(A) your foot.
(B) the car wheels.
(C) the ground.
(D) the car engine.

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Questions --- What this question is about

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18.2

When you step on the gas in your car, the wheels push against the ground and the ground pushes back. The force which makes the car accelerate is exerted by

(A) your foot. --- No.

That is an internal force between
you and the car.

Try again.

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Questions --- What this question is about

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18.2

When you step on the gas in your car, the wheels push against the ground and the ground pushes back. The force which makes the car accelerate is exerted by

(B) the car wheels. --- No.

They exert a force on the road
and an internal force on the rest of the car.

Try again.

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Questions --- What this question is about

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18.2

When you step on the gas in your car, the wheels push against the ground and the ground pushes back. The force which makes the car accelerate is exerted by

(C) the ground. --- Yes.

The ground exerts the only external force
pushing the car forward.

Check the other answers.

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Questions --- What this question is about

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18.2

When you step on the gas in your car, the wheels push against the ground and the ground pushes back. The force which makes the car accelerate is exerted by

(D) the car engine. --- No.

The engine exerts only internal forces
on the car.

Try again.

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Questions --- What this question is about

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18.2