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

ilikephysics2 Group Title

A motorist travels at a constant speed of 34.0 m/s through a school zone, exceeding the posted speed limit. A policeman waits 7.0 s before giving chase at an acceleration of 3.7 m/s2.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. ilikephysics2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Find the time required to catch the car from the instant the car passes the policeman.

    • 2 years ago
  2. ilikephysics2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Find the distance required for the policeman to overtake the motorist.

    • 2 years ago
  3. zaphod Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    For Car ( insert the values and get an equation) s = ut s = 34 t ------> (1) equation For Policeman ( he starts 7 s later so it is (t-7)) s= ut + 1/2 at^2 ( u = 0) as he strts frm rest \[s = \frac{1}{2} \times 3.7 \times (t-7)^{2}\] \[2s = 3.7(t^{2}-14t+49)\] \[2s = 3.7t^2 -51.8t +181.3\] Now plug in equation {1} in to s so \[2(34t) = 3.7t^{2}-51.8t+181.3\] i think now u can solve and find time.

    • 2 years ago
  4. zaphod Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    did u get it ...

    • 2 years ago
  5. ilikephysics2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    no?

    • 2 years ago
  6. zaphod Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ok which one u dont understnd?

    • 2 years ago
  7. ilikephysics2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    im at 3.7t^2 - 119.8t + 181.3 = 0 now im working on the quadratic equation but I keep getting it wrong please help

    • 2 years ago
  8. zaphod Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    u can either use the calculator or this formula

    • 2 years ago
  9. ilikephysics2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i tried the calculator and it keeps saying error

    • 2 years ago
  10. zaphod Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    or insert the values in this http://www.math.com/students/calculators/source/quadratic.htm

    • 2 years 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.