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A bullet of mass 0.012kg and horizontal ...

A bullet of mass `0.012kg` and horizontal speed `70 ms^(-1)` strikes a block of wood of mass `0.4kg` and instantly comes to rest with respect to the block. The block is suspended from the ceiling by means of thin wires. Calculate the height to which the block rises. Also, estimate the amount of heat produced in the block.

Text Solution

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`= 21.2 cm, 28. 5J`
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Knowledge Check

  • A bullet of m ass 10 g m oving horizontal w ith a velocity of 400 ms^(-1) strikes a w ood block of m a ss 2 kg w h ic h is s u s p e n d e d by lig h t inex ten sib le strin g of length 5 m. As resu lt the c e n tre of gravity of th e block fo und to rise a v ertical distan ce of 10 cm . The sp eed of the bullet after it em erges on horizontally from the block will b e ......

    A
    120 `ms^(-1)`
    B
    160 `ms^(-1)`
    C
    100 `ms^(-1)`
    D
    80 `ms^(-1)`

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