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qUESTIONS

A bird weighs 2 kg and is inside a closed cage of 1 kg. If it starts flying, then what is the weight of the bird and cage assembly

A shell of mass 200 g is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 80 m/s, calculate the recoil speed of the gun

A gun of mass 10kg fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is 300 ms1. The force required to hold the gun while firing is

A ball of mass 150 g starts moving with an acceleration of 20m/s2. When hit by a force, which acts on it for 0.1 sec the impulsive force is

A cricket ball of mass 150g has an initial velocity =(31+4))m/s and a final velocity v=-(3î+4})m/s,after being hit. The change in momentum (final momentum – initial momentum) is (in kg m/s)

In the previous question (4), the magnitude of momentum transferred during the hit is

A 100 g iron ball having velocity 10 m/s collides with a wall at an angle 30° and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 second, then the to force experienced by the wall is

A bullet is fired from a gun. The force on the bullet is given by F=600-2×10^5t, 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 bullet?

Two bodies of mass 3 kg and 4 kg are suspended at the ends of massless string passing over a frictionless pulley. The acceleration of the system is (g = 9.8m/s2

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be

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