A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is

A.

2.5 x 107N

B.

5.0 x 104N

C.

5.0 x 102N

D.

2.0 x 10-3N

View answer & explanation

Correct answer is B

Thrust = \(\frac{\text{mass x velocity}}{time}\)

= 10 x 5 x 103


= 5.0 x 104N

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