Someone

from visual import *

 

floor = box (pos=(0,0,0), length=4, height=0.5, width=4, color=color.blue)

ball = sphere (pos=(0,4,0), radius=1, color=color.red)

ball.velocity = vector(0,-1,0)

dt = 0.01

 

while 1:

rate (100)

ball.pos = ball.pos + ball.velocity*dt

if ball.y < ball.radius:

ball.velocity.y = -ball.velocity.y

else:

ball.velocity.y = ball.velocity.y - 9.8*dt