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Physics
Physics
Problem
A ball is projected from the ground with speed
u
u
u
at an angle of
60
∘
60^\circ
6
0
∘
above the horizontal. At a later instant, the ball is observed to be moving in a direction making an angle of
30
∘
30^\circ
3
0
∘
above the horizontal. Find the speed of the ball at that instant.
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