A ball is thrown vertically upward with speed 40 m/s. Simultaneously, another ball is dropped from a height 200 m in the same vertical line. The balls meet at a height of
A
B
C
D
80 m
Text Solution
Verified by ExpertsThe correct answer is:
A
Let the balls meet after time 
at height 
.
Ball 
(motion in vertically upward direction)
…………… (i)
Ball 
(motion in vertically downward direction)
……… .. (ii)
Adding (i) and (ii), we get
Putting 
in eq (i),
The ball meet after 5 s and at height 75 m.
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