Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

yrelhan4

  • 2 years ago

Two blocks of masses m1=2kg and m2=5kg hang over a massless pulley as in the figure. A force F=100N acting on the axis of the pulley accelerates the system upward. Find : a) the acceleration of each block b) the tension in the string.

  • This Question is Closed
  1. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    answer: 2 kg block accelerates 15.2 m/s^2 upward the 5 kg block accelerates .2 m/s^2 upward

  3. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    30/7 ? g=10m/s2

  4. 3psilon
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    How would this problem be done with the force acting on the axis? that is new to me

  5. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @3psilon it just means the system is pulled by a force upwards, i guess.

  6. 3psilon
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok let me fool around with it and I'll see if I get that answer

  7. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    right!

  8. 3psilon
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So usually in an Atwell problem like this the acceleration is the same right? But I guess that force changes the acceleration of both?

  9. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes.. acceleration of both the blocks without the force is 30/7 m/s2 .. if that could help..

  10. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Actually, this problem is simpler than an Atwood machine. Since the pulley is massless, it is very easy to find the tension in the string, and the accelerations of M1 and M2.

  11. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what about the force on the pulley?

  12. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Apply N's 2nd law to the pulley.

  13. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the pulley is massless..

  14. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Makes it even easier!

  15. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    If a massless body is accelerating, what will be the net force on it?

  16. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    0..

  17. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Vincent-Lyon.Fr what would i get after applying nlm to pulley?

  18. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Tension in the string... and the problem is done.

  19. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'll try .. i think i got it somewhat..

  20. Vincent-Lyon.Fr
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It is VERY easy, not joking!

  21. yrelhan4
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah.. thank you!

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.