A disk of mass 10 g is kept floating horizontally in the air by firing bullets each of mass 5 g with the same velocity. If 10 bullets are fired per second and the bullets rebound with the same velocity, then the velocity of each bullet is –
Text Solution
Verified by ExpertsThe correct answer is:
B
2mnv = M g
v = 
= 
= 0.98 m/s = 98 cm/s
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