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yrelhan4

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.

  • one year ago
  • one year ago

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  1. yrelhan4
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    • one year ago
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  2. yrelhan4
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    answer: 2 kg block accelerates 15.2 m/s^2 upward the 5 kg block accelerates .2 m/s^2 upward

    • one year ago
  3. yrelhan4
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    30/7 ? g=10m/s2

    • one year ago
  4. 3psilon
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    How would this problem be done with the force acting on the axis? that is new to me

    • one year ago
  5. yrelhan4
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    @3psilon it just means the system is pulled by a force upwards, i guess.

    • one year ago
  6. 3psilon
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    ok let me fool around with it and I'll see if I get that answer

    • one year ago
  7. yrelhan4
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    right!

    • one year ago
  8. 3psilon
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    So usually in an Atwell problem like this the acceleration is the same right? But I guess that force changes the acceleration of both?

    • one year ago
  9. yrelhan4
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    yes.. acceleration of both the blocks without the force is 30/7 m/s2 .. if that could help..

    • one year ago
  10. Vincent-Lyon.Fr
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    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.

    • one year ago
  11. yrelhan4
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    what about the force on the pulley?

    • one year ago
  12. Vincent-Lyon.Fr
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    Apply N's 2nd law to the pulley.

    • one year ago
  13. yrelhan4
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    the pulley is massless..

    • one year ago
  14. Vincent-Lyon.Fr
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    Makes it even easier!

    • one year ago
  15. Vincent-Lyon.Fr
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    If a massless body is accelerating, what will be the net force on it?

    • one year ago
  16. yrelhan4
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    0..

    • one year ago
  17. yrelhan4
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    @Vincent-Lyon.Fr what would i get after applying nlm to pulley?

    • one year ago
  18. Vincent-Lyon.Fr
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    Tension in the string... and the problem is done.

    • one year ago
  19. yrelhan4
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    i'll try .. i think i got it somewhat..

    • one year ago
  20. Vincent-Lyon.Fr
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    It is VERY easy, not joking!

    • one year ago
  21. yrelhan4
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    yeah.. thank you!

    • one year ago
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