Physics

The leader of a bicycle race is traveling with a constant velocity of +11.9 m/s and is 10.7 m ahead of the second-place cyclist. The second-place cyclist has a velocity of +9.10 m/s and an acceleration of +1.20 m/s2. How much time elapses before he catches the leader?

  1. 👍 0
  2. 👎 0
  3. 👁 625
  1. (v2•t+at²/2) - v1•t = 10.7
    at²/2+ (v2-v1)t -10.7 = 0
    0.6t² -2.8t- 10.7 =0
    t= [2.8±√(2.8² +4•0.6•10.7)]/1.2.
    The positive root is 7.16 s.

    1. 👍 0
    2. 👎 0
  2. Wrong

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    As soon as a traffic light turns green, a car speeds up from rest to 50.0 mi/h with a constant acceleration of 8.10 mi/h·s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant acceleration of

    asked by Lisa on April 14, 2010
  2. Science help! URGENT. Check answers

    1. True or False? A model train traveling at a constant speed around a circular track has a constant velocity. (False) 2.Which of the following would be affected if a soaring eagle changed direction but remained at a constant

    asked by Elena on October 15, 2013
  3. Physics "Simple" Energy Problem

    Jonathan is riding a bicycle and encounters a hill of height 6.70 m. At the base of the hill, he is traveling at 5.00 m/s. When he reaches the top of the hill, he is traveling at 3.00 m/s. Jonathan and his bicycle together have a

    asked by PersonWhoNeedsHelp on November 8, 2015
  4. physics

    A race car traveling northward on a straight, level track at a constant speed travels 0.750km in 20.0s. The return trip over the same track is made in 25.0s. What is the average velocity of the car in m/s for the first leg of the

    asked by Anonymous on January 29, 2013
  5. Physics

    Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite

    asked by Kyle on September 5, 2011
  1. Physics

    In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??

    asked by NoBody on April 2, 2014
  2. Physics

    1. A rabbit and a turtle are practicing for their big race. The rabbit covers a 30.0 m practice course in 5.00 seconds; the turtle covers the same distance in 120 seconds. If the actual race is run on a 96.0 m course, by how many

    asked by Piper on June 18, 2014
  3. physics

    a race car traveling northward on a straight, level track at a constant speed travels 0.750 km in 20.0 s. the return trip over the same track is made in 25.0 s. a) what is the average velocity if the car in m/s for the first leg

    asked by Katie on March 30, 2014
  4. physics

    Vroom-vroom! As soon as a traffic light turns green, a car speeds up from rest to 50.0 mi/h with a constant acceleration of 8.40 mi/h·s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant

    asked by blair on October 9, 2009
  5. physics

    (a)The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a) as his maximum velocity. Assume a sprinter accelerates at a constant rate up to their maximum velocity, which is maintained for

    asked by tom on January 26, 2016

You can view more similar questions or ask a new question.