A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Engineering mechanics question FORCES

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

    not sure what..... ive been taught about sigma Fx= 0 and sigma Fy=0 so could you uise that to explain?

    1 Attachment
  2. surry99
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hint: you need to find the force in the spring at equilibrium (draw a free body diagram) Once you have the force you can use the spring stiffness to determine how much it deflected. From that you can obtain the unstretched length of the spring.

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

    Deflected?

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

    @dareintheren Have you done free-body diagrams (FBD) yet? There are three forces that act on the block. If you can identify the three forces AND their directions. Then you use the theorem on forces at a point to say that if the block remains in equilibrium then \(\sum\)Fx=0 and \(\sum Fy=0\). And hence solve for the force in the spring. By geometry, we know that the stretched length of the spring is 0.5 (=sqrt(0.3^2+0.4^2)). Using Hookes law and the force on the spring, you can find it's unstretched length. Key topics to review: 1. Pythagoras Theorem 2. Hooke's law 3. Forces at a point and conditions of equilibrium. 4. Free-body Diagram 5. Resolving forces into two orthogonal components 6. (Optional: triangle of forces)

  5. 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.