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
\ 43 K0 = K0cos2q ̃ cos q = 23 ̃ q = 300