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qUESTIONS

A body of mass 0.4 kg starting at origin at t=0 with a speed of 10m/s in the positive x-axis direction is subjected to a constant force F=8N towards negative x-axis. Calculate the position of the particle after 25 seconds

A force vector applied on a mass is represented as F=61-8j+10k and accelerates with 1m/s2. What will be the mass of the body?

A pendulum bob of mass 50 gm is suspended from the ceiling of an elevator. The tension in the string if the elevator goes up with uniform velocity is approximately

A body is acted upon by a force F = (-31+4)N (with mass 5 kg). If its initial velocity at t=0 is v = (61-12)) ms1, the time at which it will just have a velocity along the Y-axis is

A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is

Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of vm/s will be

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 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?

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

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