Juggler throws 2 balls - when do they pass

[Rbraind]

Homework Statement

A juggler throws a ball at 10m/s and it takes 0.24 seconds to reach the ceiling which is 2.4m high. As this ball reaches the ceiling he throws a second ball also at 10m/s. How long after 2nd ball is thrown do they pass

Homework Equations

maybe just too late but I am drawing complete blank. I just worked out the time and velocity of the ball and know the same formulas apply- just how, where do i start?

The Attempt at a Solution

?

 

[tiny-tim]

Hi Rbraind!

Do y and t equations for each ball.

You need to find where y and t for one are the same as for the other …

what do you get? ​

 

[J.Jobs]

Homework Statement

A juggler throws a ball at 10m/s and it takes 0.24 seconds to reach the ceiling which is 2.4m high. As this ball reaches the ceiling he throws a second ball also at 10m/s. How long after 2nd ball is thrown do they pass

Homework Equations

maybe just too late but I am drawing complete blank. I just worked out the time and velocity of the ball and know the same formulas apply- just how, where do i start?

The Attempt at a Solution

?

I don't think u need an equation for this.
Let x be the time after the 2nd ball has passed
Assume that g=10ms^-1
10x + 10x = 2.4m
20x = 2.4m
x = 0.12 second