railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mechanics Kinematics and Kinetics Work Power and Energy
A ball is falling freely from a height of 20 m then the velocity of ball when it reaches the ground at 20 m is (assume the acceleration of gravity as 10 m/s2 )?
1
40 m/s
2
30 m/s
3
10 m/s
4
20 m/s