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*PLEASE HELP* A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. It begins the trip traveling 120 m/s and decelerates to a velocity of 20 m/s. What was its acceleration?
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*PLEASE HELP*

A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. It begins the trip traveling 120 m/s and decelerates to a velocity of 20 m/s. What was its acceleration?

User Aakash Gupta
by
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2 Answers

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Answer:

−1.11 m/s2

Explanation:

just took test, got a 100%

User Wouter De Kort
by
8.5k points
4 votes
acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

We don't care about the 150kg or the 2,500 meters. They don't make any difference.
User Doctor
by
8.3k points
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