Jee Main
Work Power And Energy
JEE Main 2021 (Online) 31st August Morning Shift
INTEGER+4 / -12021
A block moving horizontally on a smooth surface with a speed of 40 ms\(-\)1 splits into two equal parts. If one of the parts moves at 60 ms\(-\)1 in the same direction, then the fractional change in the kinetic energy will be x : 4 where x = ___________.