A spherical ball of mass 20kg is stationary at the top of a hill of height 100m. It rolls down a smooth surface to the ground, then climbs up another hill of height 30m and finally rolls done to a horizontal base at a height of 20m above the ground. The velocity attained by the ball is ___________
1.10m/s
2.10√30m/s
3.40m/s
4.20m/s
Posted Date:-2022-04-20 11:41:48