Jee Main
Center Of Mass
JEE Main 2021 (Online) 25th July Morning Shift
INTEGER+4 / -12021
A body of mass 2 kg moving with a speed of 4 m/s. makes an elastic collision with another body at rest and continues to move in the original direction but with one fourth of its initial peed. The speed of the two body centre of mass is \({x \over {10}}\) m/s. Then the value of x is ___________.