interval between the perception of a signal to stop and the application of the brakes.) If an automobile can slow down with an acceleration of 12.0 ft/s^2, compute the total distance covered in coming to a stop after a signal is observed (a) from an initial velocity of 15.0mi/h (in a school zone) and (b) from an initial velocity of 55.0 mi/h.
I was confused about this one. is the problem saying that the the final velocity will be 0 or do I have to figure this out. anyone please help me figure out how to solve this, I would really appreciate it a lot !
2007-10-09 14:44:10 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Yes, the final velocity will be zero. That is what is meant by "total distance covered in coming to a stop"
2007-10-09 14:52:39 · answer #1 · answered by skeptik 7 · 0⤊ 0⤋
Since the car is slowing to a stop, yes, the total velocity will be zero.
Basically, use the acceleration given (12.0 ft/s^2) to figure out how long it will take to decelerate from 15.0 mi/h and from 55.0 mi/h. Then add the reaction time of 0.700s to each answer, and there ya go.
2007-10-09 14:53:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋