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# Pulley block system

A block a of mass 1 kg is kept on a smooth horizontal table and attached by a light string to another block b if mass 2 kg. block b is resting on ground and thread and pulley are massless and frictionless. A bullet of mass 0.25 kg moving horizontally with velocity of u = 200 metre per second penetrates through the block a and comes out with a velocity of 100 m/s. Find the height through which the block b will rise.

Note by Parv Mor
3 years, 1 month ago

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- 2 years, 2 months ago

If I am right, I think the information is insufficient. Look when the bullet penetrates the block (I think) some of its energy will be needed to overcome the deceleration offered by the block while it is penetrating the block and some part of its energy will be imparted to the system of blocks as a whole. And it isnt stated in the question. Let me know if I am wrong.

- 2 years, 11 months ago