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A ball of 0.1 kg makes an elastic head on collision with a ball of unknown mass that is initially at rest. If the 0.1 kg ball rebounds at one third of its original speed, what is the mass of the other ball?
A 16 kg block moving on a frictionless horizontal surface with a velocity of 4 m/s compresses an ideal spring and comes to rest. If the force constant of the spring be 100 N m–1, then how much is the spring compressed?
A shot travelling at the rate of 100 ms–1 is just able to pierce a plank 4 cm thick. What velocity is required to just pierce a plank 9 cm thick?
The human heart discharges 75ml of blood at each against a pressure of 0.1 m of Hg. Calculate the power of the heart assuming that the pulse frequency is 80 beats per minute. Given, density of mercury =13.6×103 kg/m3.
Two ball bearings of mass m each moving in opposite directions with equal speed v collide head on with each other. Predict the outcome of the collision, assuming it to be perfectly elastic.
A railway carriage of mass 10000 kg moving with a speed of 15 ms–1 strikes a stationary carriages of the same collision, the carriages get coupled and move together. What is their common speed after collision?