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Question

A bullet of mass 100 g has shot a speed of 108 km/hr towards the target. What would be its kinetic energy?


A

3864 J

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B

4240 J

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C

2586 J

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D

6580 J

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Solution

The correct option is

A

45 J



The mass of the bullet is 100 g and the speed of the bullet is 108 km/hr
K.E.=12mv2, where m is the mass of the bullet and v is the speed of the bullet.
Given, m =100 g = 0.1 kg

v=108km/hr=108×518= 30 m/s
K.E.=12mv2 = 12×0.1×302=45 J


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