A ball is projected from the ground at angle 0 with horizontal. After 1 s it is moving at angle
with the horizontal and after 2 s it is moving horizontally. What is the velocity of projection of the ball?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the angle made by the instantaneous velocity with the horizontal be 
. Then,
Given, 
, when 
… (i)
, when 
… (ii)
On solving Eqs. (i) and (ii), we have
squaring and adding
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