the physics kid

This page lists questions and answers that were posted by visitors named the physics kid.

Questions

The following questions were asked by visitors named the physics kid.

Two cyclists are travelling at constant speeds around a 400 m track in opposite direction. The speed of Jeff is 1.5 times the speed of Rob. The cyclists find they meet every 20 s. What is the speed of Jeff? A) 9.0 m/s B) 12 m/s C) 13 m/s D) 20 m/s E) 30 m...

Answers

The following answers were posted by visitors named the physics kid.

thanks bobpursley the correct answer is 10m/s i just didn't know how they got it. I Presumed that they were talking about the entire 10 seconds.

Everything up is positive Everything Down is negaitive velocity initial = -15.0m/s distance final = 0m distance initial = ? time = 2s df=v * t+di 0 = -15 * (2)+di di = 30 m therefor the bridge is 30m ablive the water. Not sure if this is entirely correct.

10 foot = 304.8 cm

when an object is in free fall the acceleration (on earth) is alway 9.8m/s^2 [down]