The thrust on the rocket is:

Question

The thrust on the rocket is:

1. A. In the same direction of the rocket
2. B. In the opposite direction of the rocket (Correct answer)
3. C. At 90° to the direction of the rocket
4. D. None of the above

Correct Answer

Option B — In the opposite direction of the rocket

Detailed Solution & Explanation

The correct answer is In the opposite direction of the rocket.

Key Points

• By Newton's Third Law of Motion, the rocket expels gas in one direction (backward), and the reaction force (thrust) acts in the OPPOSITE direction (forward), propelling the rocket.

Additional Information

• Rocket propulsion follows Newton's third law: gases are expelled backward, so the reaction thrust drives the rocket forward.
• It is equally an application of conservation of momentum — the momentum of the exhaust equals and opposes that gained by the rocket.
• This is why a rocket works in vacuum: it needs nothing to push against, unlike a propeller or a wing.
• The other two laws: the first defines inertia, and the second gives F = ma, or force as the rate of change of momentum.