1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculating the upward force

  1. Nov 2, 2016 #1
    1. The problem statement, all variables and given/known data

    Gr.11 Physics, about 2 months in so I don't know much.

    Bob pitches his calculator in to the air and watches it rise to a height of 5 meters above the floor, and rebound to a height of 4 meters. The calculator was in contact with the floor for ten milliseconds, and it has a mass of 500 grams. Calculate the upward force exerted on the calculator by the floor.

    2. Relevant equations

    Here's all the equations I think would be relevant?:

    Fn = Fg
    Fg = mg
    Ff = uFn
    Fnet = ma

    3. The attempt at a solution

    I'm not entirely sure where to start with such little info. I tried to get the Force of Gravity (Fg) like this:

    Fg = mg
    = (0.5kg)(9.8)
    = 4.9N

    But I feel like the fact that it was accelerating towards the ground would increase that?

    Any help is appreciated.
     
  2. jcsd
  3. Nov 2, 2016 #2

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    No, none of those are interesting here.
    Does SUVAT mean anything to you?
    What about a relationship between force and momentum?
     
  4. Nov 2, 2016 #3
    No, and no :/ My teacher has a habit of giving us questions for things he hasn't taught us yet. Could you explain?
     
  5. Nov 2, 2016 #4
    Ah I found a video on exactly what I was looking for. I got it now :)
     
  6. Nov 2, 2016 #5
    Try to calculate the velocity right before and after the calculator hits the floor and see if you can use this to figure out the force
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Calculating the upward force
  1. Upward force tension (Replies: 3)

Loading...