Asked by Addie
A driver of a car that is going 25 m/s suddenly notices a train blocking the road. At the instant the brakes are applied, the train is 60 m away. The car decelerates uniformily and stikes the train 3 secs later. (a) How fast was the car moving on impact? (b) What was the magnitude of its acceleration during the 3 secs?
Answers
Answered by
Henry
d = Vo*t + 0.5at^2 = 60m/s.
25*3 + 0.5a(3)^2 = 60,
75 + 4.5a = 60,
4.5a = -15,
a = -3.3333m/s^2.
Vf = Vo + at = 25 + (-3.3333)3 = 15m/s.
25*3 + 0.5a(3)^2 = 60,
75 + 4.5a = 60,
4.5a = -15,
a = -3.3333m/s^2.
Vf = Vo + at = 25 + (-3.3333)3 = 15m/s.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.