Question

Determine the initial velocity of the ball if it reaches a height of 15 meters.

O 8.6 m/s

O 11.5 m/s

O 17.1 m/s

O 294 m/s

Answer 1

the initial velocity of the ball is 17.14 m/s

Step-by-step explanation:

Given;

maximum height reached by the ball, h = 15 m

let the initial velocity of the ball = u

at maximum height, the final velocity of the ball is zero, v = 0

The initial velocity of the ball is calculated by using the following upward motion kinematic equation;

v² = u² - 2gh

0 = u² - 2(9.8 x 15)

u² = 294

u = √294

u = 17.14 m/s

Therefore, the initial velocity of the ball is 17.14 m/s