A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

korosh23

  • one year ago

Physics 12 Free body diagram question! Wait for the drawing

  • This Question is Closed
  1. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1444613418797:dw|

  2. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    In my opinion it should be something like this.|dw:1444613597106:dw|

  3. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    My question is: Should there be Fg? I believe yes. I forgot to write it down, so I want to make sure. Please explain. Thank you

  4. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Also please explain how can FAx = FN = 0 N ?

  5. matt101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    Yes, Fg would be part of the diagram. Gravity and friction balance the vertical component of the applied force, while the normal force (FN) balances the horizontal component of the applied force (FAx). You know the horizontal forces must be balanced (i.e. Fnet = 0 N) because the eraser isn't accelerating into or away from the board. In this case, it might be easier for you to think of FN as a reactive force according to Newton's third law, although even conventional normal forces (e.g. due to gravity) are a consequence of this law. Simply put, the board pushes back on the eraser with whatever force FAx applies to prevent the eraser from going through the board. That means you can't define FN as μmg, because the force is not due to gravity - it's due to a force you're applying. But you don't need to worry about that, because all you need to do here is draw the free body diagram!

  6. matt101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    I've just noticed you have an upward acceleration in your diagram, so the vertical forces do not balance. If you had to do a calculation, the expression would be something like: Fnet=ma=FAy-f-Fg Where Fnet (ma) is the net vertical force that produces the acceleration, a, labeled in the diagram, FAy is the vertical component of the applied force, f is the friction, and Fg is gravity!

  7. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Long time no see my friend! lol It was last year you were helping me with physics 11 and chemistry 11. Now physics 12 :) How are you doing with your degree in university?

  8. matt101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    Good to see you too! Glad you decided to stick with physics (and chemistry?)! It's been a pretty busy summer for me so I wasn't around here too much, but it's paid off and the thesis is really coming along! Anyways if you have any other questions feel free to tag me - I'll try to be around more often!

  9. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, I am going to study engineering at university. Good luck with university and exams!

  10. matt101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 3

    Good that you're sticking with physics then! And no exams for me...I'm a grad student lol. Already have a Bachelor's degree.

  11. korosh23
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Nice :D all those hard work paid off. Go for masters, never stop.

  12. 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.