Question

A bullet of mass 200 g is moving with a<br />velocity 4 m/s. Its kinetic energy is<br />3.0 Marks<br />1.6 J<br />3.2 J<br />4.8 J<br />6.4 J​

Answer 1

Answer:

Using the work energy theorem:

W

gravity

+W

tube

=

2

1

m(v

2

−u

2

)

Since the diameter is 0.2m

W

gravity

=mgh

=0.2×10×0.2=0.4

W

tube

=0.5×0.2×(−16)−0.4=−2J

Explanation:

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