question about time at rest and other stuff i don't know about?

1 ⤊

question about time at rest and other stuff i don't know about?

If a cheetah accelerates from rest at 7.8 m/s2 in order to reach 70 mph in a distance of 30 meters, how much time has elapsed?
2 sec
4 sec
6 sec
8 sec

2007-01-17 05:28:16 · 3 answers · asked by star wars freak 2 in Science & Mathematics ➔ Physics

3 answers

This question is overspecified.

The final velocity is the square root of 2 times acceleration times distance.

It comes out to be 21.6 m/s or 48.7 mph.

The cheetah needs to push harder or else he needs more room for the run-up.

2007-01-17 05:39:03 · answer #1 · answered by Anonymous · 1⤊ 0⤋

2 s

2007-01-17 13:34:51 · answer #2 · answered by Sheen 4 · 0⤊ 0⤋

2 seconds. Thats just an educated guess of the top of my head.

2007-01-17 13:35:41 · answer #3 · answered by au197_0 3 · 0⤊ 0⤋