1. a car accelerates constantly. it started at 10 m with a velocity of 15 m/s and ended at 40 m with velocity of 60 m/s, what was the acceleration?
2. a person falls out of a hot air balloon. eyewitnesses reported that it took the person 5 secs. to hit the ground. what was the person's velocity just before they hit the ground?
3. a car with an intitial velocity of 30 m/s slammed on the brakes and skidded to a stop. if the skid marks created by the tires were 15 m long, and the car experienced constant acceleration, what was the car's acceleration while the brakes were applied.
4. if the driver of a car applied the brakes so that the car had an acceleration of -3m/s^2, and the car started out with a velocity of 50 m/s, what was the distance required for the car to come to a stop?
use one of the following equations:
1. V=Vo+at 2. X=Xo+Vo t+1/2at^2
3. v^2=Vo^2+2a(X-Xo)
thank you if you do help......
2007-10-04
12:36:48
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1 answers
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asked by
anynomous
1
in
Physics