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Jayshree Harjo
Asked: 2022-11-07T07:28:24+05:30 In:

A bullet of mass 5 g travels with a speed of 500m/s. If it penetrates a fixed target which offers a constant resistive force of 1000N to the motion of the bullet, find (a) the initial kinetic energy of the bullet (b) the distance through which the bullet has penetrated.

A bullet of mass 5 g travels with a speed of 500m/s. If it penetrates a fixed target which offers a constant resistive force of 1000N to the motion of the bullet, find (a) the initial kinetic energy of the bullet (b) the distance through which the bullet has penetrated.
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  1. Correct Answer – A::B
    Here, `m = 5g =0.005kg, upsilon =500m//s, F =1000N`
    (a) `E_k = (1)/(2)mupsilon^2 = (1)/(2) = (1)/(2)(0.005kg)(500m//s)^2 =625J`
    (b) As `W= E =F_s,s =(E_k)/(F) = (625J)/(1000N) = 0.625m`

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