The velocity of a bullet changes from v 0 to v after the bullet has passed through a distance h in the plank. Assuming resistance offered is proportional to v 2 , find the time of motion in the plank.
A
B
t = 
C
t = 
D
t = 
Text Solution
Verified by ExpertsThe correct answer is:
C
F = -kv 2 , a = 
or 
.
or log e 
form (1) and (2) t = 
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