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## Homework Statement:

- Ball 1 is thrown straight up in the air and comes back down after 2.75 seconds. Same ball (Ball 2) is thrown at a 40 degree angle and takes the same time to come down. What is Ball 2's initial velocity?

## Relevant Equations:

- Equations of motion

From Ball 1 I can can determine it's initial velocity and then maximum height. I'm not sure how this is relevant, as I cannot find a formula using angle, time, height and velocity. I have found h=V(squared) x sin (squared) Theta / 2g and also t=2Vsin Theta/g. These give similar, but different results, though and the second one can be used without any information from Ball 1, so why include it? I think I am mixing up my formulas, but have no idea where to go.