Work Energy And Power Question 118

Question: A big ball of mass M, moving with velocity u strikes a small ball of mass m, which is at rest. Finally small ball obtains velocity u and big ball v. Then what is the value of v [RPET 2001]

Options:

A) $ \frac{M-m}{M+m}u $

B) $ \frac{m}{M+m}u $

C) $ \frac{2m}{M+m}u $

D) $ \frac{M}{M+m}u $

Show Answer

Answer:

Correct Answer: A

Solution:

From the formulae $ v_1=( \frac{m_1-m_2}{m_1+m_2} )\ u_1 $ We get $ v=( \frac{M-m}{M+m} )\ u $



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