A kid jumps a meter into the air. How long before he lands?(adsbygoogle = window.adsbygoogle || []).push({});

The answer to this question is .95 seconds.

I first calculated the time it took for the kid to fall downward. Which was about .45 seconds. But I used the acceleration of 9.8 m/s^2 since he was falling downward. My teachers answer of .95 is assuming that he jumps upward at the rate of 9.8 m/s^2. Is that accurate? I mean, the kid could have jumped up really quickly, but gravity would still pull him down at a rate of .45 sec.

Thank you for the clarification.

Also what is this kid's initial velocity? Is it zero?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: A kid jumps a meter into the air. How long before he lands?

**Physics Forums | Science Articles, Homework Help, Discussion**