physics question?

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A race car has a mass of 710 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

2006-10-23 14:41:42 · 3 answers · asked by yoo whoo 1 in Science & Mathematics ➔ Physics

3 answers

Answer 1 used the acceleration-from-velocity formula in a problem calling for the acceleration-from-distance formula.
s (distance) = 0.5*a*t^2, so a = 2*s/t^2 = 80/9. f=ma; you can do the math for that.

2006-10-23 14:48:13 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋

F=ma

a=40.0/3.0

F= 710 * 40/3
= 9466.666..
=9470 N (3 sf)

2006-10-23 21:45:12 · answer #2 · answered by CaiZ.StarGazer 2 · 0⤊ 0⤋

Hmm... I don't know. That'll take time...

2006-10-23 21:49:36 · answer #3 · answered by taylor ! 4 · 0⤊ 0⤋