Supposed that a 1000 kg car is traveling at 25 m/s Its brakes can apply a force of 5000n what is the minimum distance required for the car to stop?
2006-11-13 04:16:39 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
acc=F/m=-5
v*v=u*u + 2*a*S
s=62.5m
2006-11-13 04:29:49 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Kinetic energy possessed by the car = 0.5 mv² = 312500J
Assuming that the only resistive forces come from the brakes when it is stopping, the work done by brakes = 312500 = Fd.
So d = 312500 / 5000 = 62.5m
Hope this helps=)
**Brush up more on Work, Energy, Power topics to help yourself.
2006-11-13 12:41:49 · answer #2 · answered by luv_phy 3 · 0⤊ 0⤋
25 meters
2006-11-13 12:20:22 · answer #3 · answered by Ray H 7 · 0⤊ 0⤋
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2006-11-13 12:18:51 · answer #4 · answered by Anonymous · 0⤊ 0⤋