Rotational Motion Question 142

Question: The mass per unit length of a non-uniform rod of length L varies as m=λx where λ is constant. The centre of mass of the rod will be at:

Options:

A) 23L

B) 32L

C) 12L

D) 43L

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Xcm=0L(dm)x0L(dm)=0L(λxdx)x0L(λxdx)=2L3  



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