5. A bullet initially moving with a velocity 20 m -
strikes a target and comes to rest after penetrating a
distance 10 cm in the target. Calculate the retardation
caused by the target.
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Answer:
retardation is nothing but negitive of acceleration
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QUESTION:-
A bullet initially moving with a velocity 20 m s strikes a target and comes to rest after penetrating a distance 10 cm in the target. Calculate the retardation.
ANSWER:-
u = 20m/s
v = 0
s = 10cm = 0.1m
Let reatardation = a
v² = u² + 2aS
0 = (20)² −(2×a×0.1)
a = 400/2 m/s²
= 2000m/s² (ans)
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