Question

A ball is thrown vertically upward with a velocity of 20m/s calculate the maximum height reached by the ball

Answer 1

If air resistance is neglected, just use the equation below:

height = (vf^2 - vi^2)/2g

where:

vf - final velocity(at the maximum height it will be zero)

vi = initial velocity (20m/s)

g - acceleration due to gravity (-9.8m/s^2

height = [(0m/s)^2 - (20m/s)^2] / 2(-9.8m/s^2)

height = 20 meters

Answer 2

u=20

g=10

v=0

h=?

by using third equation of motion

v²=u²+2as

u²=2gh

400=20h

h=20

hope it helps