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21. A body of mass 0.25 kg is projected with muzzle velocity 100ms ^-1 from a tank of mass 100 kg. What is the recoil velocity of the tank

(a) 5 ms ^-1 (b) 25ms ^-1

(c) 0.5 ms ^-1 (d) 0.25 ms ^-1

ans. d

PrevPrevious22. A particle starts rotating from rest. Its angular displacement is expressed by the following equationθ =0.025t square-0.1t where θ is in radian and t is in seconds. The angular acceleration of the particle is

NextA bullet is fired from a gun. The force on the bullet is given by f = 600- 2 x 10 5 t where F is in newtons and t in seconds. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bulletNext

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