A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

A physics class launches their physics teacher off a building by first throwing her onto a trampoline only to be bounced off the roof. The teacher leaves the trampoline going 12m/s into the air, and onto a collection of cardboard boxes 45m below. a) How high did the teacher bounce? b) How long was the teacher in the air? c) What was the teachers velocity just before she hit the boxes below?

  • This Question is Open
  1. aaronq
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1443406379306:dw| because they dont give a horizontal velocity, we assume the bounce is straight up (only in the vertical direction). We have the acceleration due to gravity opposing the movement of the person, who slows down, comes to an instantaneous stop and begins moving down. We wanna know the highest point, which can be done in several ways, i'm assuming they want you to use kinematic equations of motion. We can use: \(\sf v_f^2=v^2_i+2a\Delta y\) Solving for the distance, \(\Delta y\), we get: \(\sf \Delta y=\dfrac{v_f^2-v^2_i}{2a}=\dfrac{0^2-(12~m/s)^2}{-9.8~m/s^2*2}=7.34693~m\approx 7.3~m\) Try using the rest of the equations of motion to get b) and c).

  2. IrishBoy123
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Qu are we modelling the teacher as a point mass? [that was a physics joke, and therefore very unfunny]

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

    ( ͡° ͜ʖ ͡°)

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.