Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

indigo25

A sprinter runs is running a 100m race. He accelerates at 2.8m/s^2 for 4.3 seconds and from there he finishes the race at a constant speed. What time does the sprinter finish the race?

  • one year ago
  • one year ago

  • This Question is Closed
  1. NoelGreco
    Best Response
    You've already chosen the best response.
    Medals 0

    I think you mean, " He accelerates at 2.8m/s^2 for 4.3 seconds, and from there he finishes the race at a constant speed."

    • one year ago
  2. indigo25
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes that is what I meant to say. I was thinking of when the sprinter reached their top speed when I wrote that Any idea how to solve it? I assume I am supposed to use the quadratic equation to solve for T right? But I am not sure how to set it up.

    • one year ago
  3. curiousshubham
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay here's the idea: In the first case, it is given; a = 2.8m/s^2 t = 4.3s Let, s = x Find final velocity using this data. For the second case, final velocity of first case = initial velocity of second case. final velocity of second case = 0 (finishes the race i.e. rest) s = 100 - x.

    • one year ago
  4. amishra
    Best Response
    You've already chosen the best response.
    Medals 0

    :)

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.