Questions
A bullet when fired at a target with velocity of 100 ms-1 penetrates 1 m into it. If the bullet is fired at a similar target with a thickness 0.5 m, then it will emerge from it with a velocity of
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Correct option is A
Let a be the deceleration of the bullet in both cases .Then 1002 = 2a×1 ...............1In the second case v2 =1002 - 2a×0.5 ..............2 Solving , v = 502 m/sSimilar Questions
A particle is moving along the x-axis whose acceleration is given by , where x is the location of the particle. At t = 0, the particle is at rest at x = 4/3 m. The distance travelled by the particle in 5 s is
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