A body at rest breaks into two pieces of equal masses. The parts will move

Options

A. Both of them have equal speeds
B. Both of them move along a same line with unequal speeds
C. Sum of their momentum is non zero
D. They move along different lines with different speeds

Answer

B

Explanation

`m_1v_1 + m_2v_2 =0`
`implies m_1v_1 =-m_2 v_2 ` (along same line).