A bullet of mass 10 gm is fired from a refile with a velocity of 800 m/s. After passing through a mud wall thick, the velocity drops to 100 m/s. The average resistance of the wall is

750 N

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1250 N

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-3150 N

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2250 N

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Solution

The correct option is C -3150 N
The correct answer is -3150N

We have,

$m a s s = 10 g$

$u = 800 m / s$

$v = 100 m / s$

By using,

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

$800^{2} - 1000^{2} = 2 a$

$= - 315000 = a$

We know that,

$f = m a$

$= 0.01 \times - 315000$

$f = - 3150 N$

Where -sign indicates that the force will receive.

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A bullet of mass 10 gm is fired from a refile with a velocity of 800 m/s. After passing through a mud wall thick, the velocity drops to 100 m/s. The average resistance of the wall is

The correct option is C -3150 NThe correct answer is -3150NWe have,mass=10gu=800m/sv=100m/sBy using,v2−u2=2as8002−10002=2a=−315000=aWe know that, f=ma=0.01×−315000f=−3150NWhere -sign indicates that the force will receive.