Question

A ball is thrown vertically upward attains a maximum height of 45 m. The time after which velocity of the ball
become equal to half the velocity of projection? (use g = 10 m/s2)
(1) 1.5 s
(2) 2s
(3) 1s
(4) 0.5 s​

Answer 1

Answer:

Given, Max height = 45 m, gravitational acceleration of Earth = 9.8 m / sec sq, Final velocity (v) when ball reaches the max height = 0 m/s. Therefore, the time after which the velocity of the ball becomes half of the velocity of projection is 1.51 seconds

Explanation:

option one is correct that is 1.5