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Grade: 12th pass
        
in a smooth stationary cart of length d, a small block is projected along its length with velocity v towards front. coefficient of restitution for each collision is e. Cart rest on a smooth ground and can move freely .Time taken by block to come to rest w. r. t cart is 
one year ago

Answers : (2)

ruhi
16 Points
							
the block will take infinite time to come to rest w.r.t the cart because the surface of the cart  is smooth hence it is frictionless i.e. thier is no external force to stop the block so according to first law of motion it will remain in moving condition..
 
one year ago
Navneet Tulsyan
11 Points
							
If block come to the rest with respect to the cart then both will have same speed in ground frame.
It is given by : mv/(m+M), it is in accordance with the conservation of linear Momentum in horizontal direction as no external force is acting on the system in horizontal direction(Where m is mass of block and M is mass of Cart).
 
one year ago
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