Jules kicks a soccer ball off the ground and into the air with an initial velocity of 25 feet per second. Assume the starting height of the ball is 0 feet. Approximately how long does it take until the soccer ball hits the ground again?

0.6 sec

0.8 sec

1.6 secs

2.8 secs

Question

Jules kicks a soccer ball off the ground and into the air with an initial velocity of 25 feet per second. Assume the starting height of the ball is 0 feet. Approximately how long does it take until the soccer ball hits the ground again?

 0.6 sec

 0.8 sec

 1.6 secs

 2.8 secs

cwrw238 · Answer

use  one of the equations  for motion under gravity:

initial velocity u = 25ft/ s  , acceleration a = 32 ft s-2, displacement s = 0, t = ?

s = ut + 0.5at^2

anonymous · Answer

Ok thanks

cwrw238 · Answer

oops sorry  a = -32 ft s-2      negative as its acting against the motion of the ball