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Question

Question: A body is projected such that its KE at the top is 3/4th of its initial KE. What is the angle of pro...

A body is projected such that its KE at the top is 3/4th of its initial KE. What is the angle of projectile with the horizontal?

A

300

B

600

C

450

D

1200

Answer

300

Explanation

Solution

Q K = K0cos2q

\ 34\frac { 3 } { 4 } K0 = K0cos2q ̃ cos q = 32\frac { \sqrt { 3 } } { 2 } ̃ q = 300