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

Fosterthepeople Group Title

help

  • one year ago
  • one year ago

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

    A 1,200 kg car rolls down a hill with its brakes off and transmission in neutral. At one moment it is moving 5.0 m/s. A little later it is moving at 8.2 m/s. How much did its height change between the two times? Assume friction and air resistance have no effect on its motion. (Points : 1) 1.5 m 2.2 m 4.3 m 1.9 m

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

    the gravitational force cause the car accelerate. acceleration is almost constant and it is 9.8 m/sec^2. 5m/s -8.2m/s=3.2 m/s the change in velocity is 3.2 m/s. acceleration=(change in velocity)/time. 9.8=3.2/time time=0,326 sec. The distance car took in 0.326 sec. is y=5x0.326+0.5x9.8x0,106=>y=2.15 meters

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

    The tru answer is 2.2 (rounded 2.15 to 2.2)

    • 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.