Homework Help: physics

Posted by zac on Friday, September 3, 2010 at 1:53am.

An 18-year-old runner can complete a 10.0 km course with an average speed of 4.51 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.31 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time as the older runner?

physics - drwls, Friday, September 3, 2010 at 5:31am
The older runner requires 10,000/4.31 = 2320.2 s and the younger one requires
10,000/4.51 = 2217.3 s
The difference is 102.9 s. That is the head start required for them to finish at the same time.

Answer this Question

Related Questions

Physics - An 18-year-old runner can complete a 10.0-km course with an average ...
physics - An 18-year-old runner can complete a 10.0-km course with an average ...
Physics - An 18-year-old runner can complete a 10.0-km course with an average ...
physics - An 18-year-old runner can complete a 10.0 km course with an average ...
Physics - A runner completes an 850m race with two laps of the 425m track in the...
Physics - A runner is jogging at a steady 8.4 km/hr. When the runner is 2.6 km ...
physics - A runner, beginning at rest, completed a 50 m run with a final speed ...
physics - Sprinting near the end of a race, a runner with a mass of 70 kg ...
physics - A runner is jogging at a steady 2.3 km/hr. When the runner is 8.4 km ...
Physics - It takes a runner 3 h, 28 min, 33 s to run a marathon. If the distance...

For Further Reading

First Name:
School Subject:
Answer: