Velocity of the ball when it impacts on the ground.
A ball is released from a height of 10m from ground, what will be the velocity of the ball when it impacts on the ground. Gravitational Acceleration g=9.8m/s2 .
a. 15 m/s
b. 20 m/s
c. 14 m/s
d. Can not say
Correct Answer : c. 14 m/s
As ball is released the initial velocity u is zero. Taking acceleration a as g=9.8m/s2 using motion equation v2 = u2+ 2as we can find final velocity v that will be 14 m/s.