Ball Is Thrown At Angle Оё With Horizontal

A ball is thrown at an angle θ with the horizontal. Its initial kinetic energy is 100 J and it becomes 30 J at … ) cos-1 (3/10) (d)…

Answers:

Correct Option (d) cos^-1 (√3/10)

Explanation:

KE at highest point K’ = K cos² θ

30 = 100 cos² θ

⇒ cos² θ = 3/10