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4., , There are two bodies A & B of same mass,, body A is at rest while body B is under going, uniform motion, which is correct statements?, , (1) Inertia of A > inertia of B., (2) Inertia of B > inertia of A., (3) Inertia of A = inertia of B., , (4) Either 1*, 2" or 3 depending upon the, shape of body., , A particle is acted upon by a force given by, F =(12t + 32)N, where t is in seconds. Find the, change in momentum of that particle from, t=1tot=3 sec., , For the given momentum-time (P-t) graphs find, the ratio of force on particles A & B., , , , , , A ball of mass 2 kg is moving with velocity, 20 m/sec strikes with the surface and rebounds, with same speed, if time of contact is 0.1 sec, then calculate average force on the ball., , A machine gun fire bullets of mass 40 gm each, with the velocity of 1000 m/sec. If average, force is exerted on the gun F is 400 N, then find, the no. of bullets fired per minute., , 10., , il., , 12., , ‘When a same force is applied on two different, objects. It produces accelerations of 4 m/sec”, and 6 m/sec’. In these objects, if the same force, is applied on the combination of these objects,, calculate acceleration of combination., , A body moving with uniform velocity is, stopped in 0.25 second by applying a retarding, force of 200 Newton. The initial momentum of, the body will be :, (1) 50 N-s (2) 100 N-s, , (3) 150 N-s (4) Zero, , The exhaust velocity of gases with respect to, a small rocket of mass 25 kg. is 28 x 10°m/s., At what rate the fuel must burn so that it may, rise up with an acceleration of 9.8 m/s? ?, (1) 175 Kg (2) 1.75 Kg/s, , (3) 0.175 Kg/s (4) Zero, , At a place where the acceleration due to gravity, is 10 m/s’, a force of 5 kg-wt acts on a body, in horizontal direction on mass of 10 kg which, is initialy at rest. The velocity of the body after, , 4s is:, (1) 5 m/s (2) 20 m/s, (3) 10 m/s (4) 50 m/s, , Suppose a rocket with an initial mass M, eject, a mass Am in the form of gases in time Ar, then, the mass of the rocket after time t is :, Am An, , (1) Mo-F>t @) My-=", Am, , (3) My +2 (4) My, , A cart is moving with a velocity 20 m/s. Sand, is being dropped into the cart at the rate of, 50 kg/min. The force required to move the cart, with constant velocity will be :, (1) SON (2) 30.33N, , 3) 26.45N (4) 16.66N
