Robert leaps a meter into the air, how long before he lands?

[ADH]

Robert is jamming out on the air guitar and leaps a meter into the air on a hot riff. How long does it take before he lands?

Thank you.

 

[rock.freak667]

Robert is jamming out on the air guitar and leaps a meter into the air on a hot riff. How long does it take before he lands?

Thank you.

You need to post your attempt.

 

[ADH]

I don't have an attempt. I'm not even sure what formula to use, or how to solve this equation. I do know that acceleration is 9.8 m/s^2. But I'm not sure how to solve this. Thank you.