Two masses of 0.25 kg each moves towards each other with speed 3 `ms^(-1)` and 1 `ms^(-1)` collide and stick together. The final velocity will be

Options

A. `0.5ms^(-1)`
B. `2ms^(-1)`
C. `1ms^(-1)`
D. `0.25ms^(-1)`

Answer

C

Explanation

`m(v_1 -v_2 ) =(m+ m)v`
`implies v = (0.25 xx(3 -1))/(2xx0.5) = 1m//s`