Apentix/AP Physics 1/Unit 2: Dynamics/Question

AP Physics 1easymcq1 pt

A rocket in deep space fires its engine. It accelerates because

A.the engine expels gas backward and the gas pushes the rocket forward

B.the exhaust gas pushes against the surrounding air

C.the engine pulls the rocket forward internally

D.gravity from nearby planets

Explanation

Core Concept

Newton's third law: the rocket's push on the exhaust is paired with the exhaust's push on the rocket.

Correct Answer

Athe engine expels gas backward and the gas pushes the rocket forward

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