A body of mass m, moving with a velocity 10 ms. collides with another body at rest of mass m. After collision the velocities of the two bodies are 2 ms and 5 ms' respectively, along the direction of motion of m The ratio m1/m2is

Options

A. `5/12`
B. `5/8`
C. `8/5`
D. `12/5`

Answer

b

Explanation

According to law of conservation of linear momentum ` m_(1) u_(1)+ m_(2) u_(2)= m_(1) v_(1)+ m_(2) v_(2)`
` m_(1)xx10+ m_(2)xx0= m_(1)xx2+ m_(2)xx5`
`10 m_(1)=2 m_(1)+5 m_(2)`
` m_(1)/ m_(2)=5/8`