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A thin uniform straight rod of mass 2 kg...

A thin uniform straight rod of mass `2 kg` length `1 m` is free to rotate about its upper end when at rest. It receives an impulsive blow of `10 Ns` at its lowest point, normal to its lengths as shown in figure. Find the kinetic energy of rod just after impact.
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Text Solution

Verified by Experts

The correct Answer is:
`75 J`
Angular impulse `= Delta L, J xx r = Delta L`
Given that `L = 100` & `I = (ml^(2))/(3) = (2)/(3)`
since `KE = (L^(2))/(2 I) rArr L = (10^(2))/(2 xx 2//3) 75 J`.
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