The speed of the projectile at maximum height is half of its initial speed v. If its angle of projection is

Explanation

At maximum height in projectile motion, the vertical component of velocity becomes zero. Using trigonometric relations, it can be shown that when the angle of projection is 60°, the vertical component of initial velocity is half of the initial speed (v).Incorrect Options Explanation:(a) 30°: This angle does not result in the vertical component of velocity being half of the initial speed at maximum height.(c) 45°: The angle of 45° results in the maximum range, but it does not necessarily mean that the vertical component of velocity at maximum height is half of the initial speed.(d) 90°: At 90°, the projectile is projected vertically upwards, and the horizontal component of velocity becomes zero, but this doesn't relate to the condition stated in the question.