Question

5. A bullet initially moving with a velocity 20 ms strikes a target and comes to rest after penetrating a distance 10 cm in the target. Calculate the retardation caused by the target. Ans. 2000 m s-2​

Answer 1

Explanation:

u=20ms

−1

v=0

s=10cm=0.1m

Let reatardation=a

v

2

=u

2

−2as

or 0=(20)

2

−(2×a×0.1)

or a=

2

400

ms

−2

=2000ms

−2

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