Catch the Ball
Classical Mechanics
Level
2
You throw a tennis ball straight up in the air from your rooftop with a velocity of 4.9 m/s. How much time will it stay in the air?
none of the above
1
2
0.5
1.5
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
We know, v=u+at, Here, v = 0 a = - 9.8 m/s^2 u = 4.9 m/s, So, t= − 9 . 8 0 − 4 . 9
= 0.5 . It will take same time for the ball to come back. Therefore,the answer is 2 times 0.5=1 .