A bullet of mass $10 g m$ strikes a fixed target and penetrates $8 c m$ into it. If the average resistance offered by the target to the bullet is $100 N$ . The velocity with which the bullet hits the target is:

35 m / s

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45 m / s

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25 m / s

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40 m / s

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Solution

The correct option is D $40 m / s$
Formula,

$v^{2} - u^{2} = 2 a s$

$0 - u^{2} = 2 (\frac{- 100}{0.01}) 0.08$

$- u^{2} = - 1600$

$∴ u = 40 m / s$

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A bullet of mass 10 gm strikes a fixed target and penetrates 8 cm into it. If the average resistance offered by the target to the bullet is 100 N. The velocity with which the bullet hits the target is:

The correct option is D 40 m/sFormula,v2−u2=2as0−u2=2(−1000.01)0.08−u2=−1600∴u=40m/s

A bullet of mass $10 g m$ strikes a fixed target and penetrates $8 c m$ into it. If the average resistance offered by the target to the bullet is $100 N$ . The velocity with which the bullet hits the target is:

The correct option is D $40 m / s$
Formula,

$v^{2} - u^{2} = 2 a s$

$0 - u^{2} = 2 (\frac{- 100}{0.01}) 0.08$

$- u^{2} = - 1600$

$∴ u = 40 m / s$