Question

a ball is thrown with a velocity of 10m/s.find the velocity with which it hits ground neglecting air drag.

Answer 1

Answer:

Yes it will, if you are neglecting the air friction. When you launch a ball will 10 m/s velocity, the ball should come down with the exact same velocity since there is no loss of energy in the process unless friction plays a role. Then energy is lost as the ball moves up and comes down due to friction with air which will resist the motion. Thus the ball will come down with a velocity less than 10 m/s.

This is also true for the case of a projectile motion.

If you draw any horizontal line, it will have the same velocity (both x and y components)