How tall is the baseball player?

Question

A baseball player throws a baseball with a horizontal velocity of 100m/s west. The ball hits the ground 0.5 seconds later. How tall is the baseball player?

 

SHOW WORK PLEASE

Answer 1

Ball moves in projectile motion launched horizontally.

Look this scene from from edge, just the ball's vertical motion.

Initially it starts from rest then accelerates until it hits the ground.

So, initial velocity u= 0m/s

time of fall = 0.5 sec

Its falling downwards so acceleration due to gravity (g)=9.8 m/s²

For falling objects, we have

H=ut+1/2gt²

  =0X0.5 + 1/2 X9.8X (0.5)²

  =0+1/2 X 9.8 X 0.25

  =1.225

So, height of the bassball player is 1.225m.

Answer 2

h=-1/2 gt^2 +H0

g=9.8    t=0.5

0=-9.8/2*(0.5)^2+H0

H0=9.8/2*(0.5)^2= 1.22 m