Rocket engine lifts rocket from Earth's surface, however high gas with high velocity
Correct answer: A. React against rocket and push it up
- A. React against rocket and push it up
- B. Push against the air
- C. Push against the Earth
- D. Heat up the air which lifts the rocket
Explanation
This option correctly reflects Newton's third law of motion. The high-velocity gases expelled downward from the rocket engine exert an equal and opposite force (action) that propels the rocket upward (reaction), as per Newton's third law.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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