Physics-
General
Easy
Question
Three balls 
are thrown from a height 
with equal speed upwards, downwards and horizontally respectively. What is the relation among speeds 
with which they hit the ground?
The correct answer is:
Let the initial velocity of balls 
are equal and its magnitude is 
Since, the ball 
is projected with velocity 
in upward direction, so when it will come back to the projection point, its velocity remains same. So, the final velocity of ball 
when it hits the ground is given as
Hence, 
And the final velocity of ball 
is
But the initial vertical velocity of the ball 
is zero.
So, 
(iii)
Hence, it is clear from Eqs. (i), (ii) and (iii), we get
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