The velocity of bullet is reduced from 200 m/s to 100 m/s while travelling through a wooden block of thickness of 10 cm. The retardation assuming to be uniform, will be:
Text Solution
Verified by ExpertsThe correct answer is:
A
Here: Initial velocity = 200 m/s
Final velocity (v) = 100 m/s
distance s = 10 cm = 0.1 m
Using the relation of equation of motion
v 2 = u 2 + 2as
a = 
= 
= – 150000 m/s 2
= – 15 × 10 4 m/s 2
(–) minus sign denotes retardation
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