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Question

In a direct impact, loss in kinetic energy is given by K=M1M22(M1+M2).(V1V2)2(1K2) with usual

notations(except k). The quality k will have dimensional formula:



Solution

The correct option is C


Since 1 and k2 are being subtracted , they should have the same dimensions. 1 is a number i.e. dimensionless

[1k2]=M0L0T0

Hence, [k]=M0L0T0

Actually, k is the coefficient of restitution. 

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