Answered

Join the IDNLearn.com community and start getting the answers you need today. Find the answers you need quickly and accurately with help from our knowledgeable and dedicated community members.

A speeding train slams on the brakes when it sees a car is on the tracks in front of it. It takes the train 25 seconds for it to go from an initial speed of 75 m/s to come to a complete stop. What is the train’s acceleration?

Sagot :

Explanation:

Given:

Initial Velocity is 75 m/s

Fianl Velocity: 0 m/s

Time 25 seconds.

Acclereation?

Use kinematic equation,

[tex]v _{f} = v _{i} + at[/tex]

[tex]0 = 75 \frac{m}{s} + a(3s)[/tex]

[tex]{ - 75} \frac{m}{s} = 3s(a)[/tex]

[tex] - {25} \frac{m}{ {s}^{2} } = a[/tex]

So the acclereation is -25 m/s^2. Since the Velocity is positive and acclereation is negative, the train will be slowing down.

We value your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. IDNLearn.com has the solutions to your questions. Thanks for stopping by, and come back for more insightful information.