Ask Question
26 September, 14:40

As a train accelerates uniformly, it passes successive 5-kilometer markers while traveling at velocities 10 m/s and 25 m/s. what is the velocity in km/h when it passes the next marker? round to nearest tenth of a km/h.

+3
Answers (1)
  1. 26 September, 17:45
    0
    122.0 km/hr. First let’s make sure all of our units are in the base meter form: i. e. convert 5km to 5000m. (We will convert back to km later). The first thing to do is look at the equation relating velocity, acceleration, and distance: Vf^2 = Vi^2 + 2*a*d, where Vf is final velocity, Vi is initial velocity, a is acceleration, and d is distance. 25^2 = 10^2 + 2*a*5000 = ?> 625 = 100 + 10000a = > a = 0.0525m/s^2. Now that we have acceleration, we can use the same equation again with different numbers.: Vf^2 = Vi^2 + 2*a*d = 25^2 + 2*0. 0525m*5000 = 625 + 525 = 1150 = > Vf^2 = 1150 = > 33.9m/s. Convert to km/hour: 33.9m/s * 1km/1000m * 60s/1min * 60min / 1 hr = 122.0 km/hr.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “As a train accelerates uniformly, it passes successive 5-kilometer markers while traveling at velocities 10 m/s and 25 m/s. what is the ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers