Q16: A rocket drifts sideways in outer space from point A to point B as shown be

Question

Q16: A rocket drifts sideways in outer space from point A to point B as shown below. The rocket is subject to no external forces. Starting at position B, the rocket's engine is turned on and produces a constant thrust (force on the rocket) at right angles to the line AB. The constant thrust is maintained until the rocket reaches a point C in space. As the rocket moves from position B to position Cits speed is increasing for a while and constant thereafter. continuously decreasing O constant for a while and decreasing thereafter. constant. continuously increasing.

Explanation / Answer

Option A: Speed increases for a while and remains constant thereafter. This is because for a while, impulse provided by the rocket is providing acceleration to the rocket. After a while, the impulse becomes zero as the velocity of gases becomes equal and opposite to the speed of rocket. Thus impulse becomes zero.

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