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Questions  

The rate of mass of the gases emitted from rear of a rocket is initially 0.1kgs1. If the speed of the gas relative to the rocket is 50 m/s  and mass of the rocket is 2 kg, then the acceleration of the rocket  is

a
5
b
5.2
c
2.5
d
25

detailed solution

Correct option is C

As a=ΔvΔt=vm⋅ΔmΔt =502×0.1=2.5ms−2

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