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A bullet emerges from a barrel of length...

A bullet emerges from a barrel of length 1.2 m with a speed of 640 m/s. Assuming constant acelaration, the approximate time that it spends in the barrel after the gun is fired is -

A

4 ms

B

40 ms

C

400 `mus`

D

1s

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Knowledge Check

  • Water from a tap emerges vertically down wards with an initial speed of 1 m/s. The cross-sectional area of the tap is 10^(-4) m^2 . Assume that the pressure is constant through out the stream of water and the flow is steady. The cross-sectional area of the stream 0.15 m below the tap is (Take g = 10 m//s^2 )

    A
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    B
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    C
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    D
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