A disc of mass 10 g is kept floating horizontally by throwing 10 marbles per second against it from below. If the mass of each marble is 5 g. What will be velocity with which the marbles are striking the disc? Assume that, the marble strikes the disc normally and rebound downwards with the same speed.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Here, 
mass of one marble
Here, 
mass of disc
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