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AravindG

  • 3 years ago

A block of mass M is pulled along a frictionless surface by a rope of mass m.If a force P is applied at the free end of rope ,What will be the force exerted by the rope on the block???

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  1. 101Ryan101
    • 3 years ago
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    As the rope pulls the block, the block pulls back with equal force in the opposite direction. So I'll go with 2p. But I'm not sure of that.. Anyone?

  2. 101Ryan101
    • 3 years ago
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    wait that's not right...

  3. 101Ryan101
    • 3 years ago
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    F=ma

  4. Ishaan94
    • 3 years ago
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    see just take mass of rope plus the block and then apply all formulas

  5. Ishaan94
    • 3 years ago
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    like joint bodies

  6. Ishaan94
    • 3 years ago
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    they have reaction forces between them

  7. 101Ryan101
    • 3 years ago
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    (M+m)a = p

  8. 101Ryan101
    • 3 years ago
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    ?

  9. Ishaan94
    • 3 years ago
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    | r | <-------rope -------- | r | < --------block so r is the force exerted by the rope on the block r = m(block)a and from the rope equation

  10. Ishaan94
    • 3 years ago
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    f (force applied ) + r = m(rope)a now get r

  11. 101Ryan101
    • 3 years ago
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    Maybe I should thing twice about taking physics. lol

  12. Ishaan94
    • 3 years ago
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    lol no you should take it

  13. 101Ryan101
    • 3 years ago
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    I don't really understand why its F+r on the left side there..

  14. Ishaan94
    • 3 years ago
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    the thing is block | rope |---------------------- R<-| ---------> R |---------------------- | --------------------------------------------------

  15. Ishaan94
    • 3 years ago
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    R is the reaction force or contact force

  16. Ishaan94
    • 3 years ago
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    ------------------------------------ ---->R |--------->p ------------------------------------ P + r = m(rope)a

  17. 101Ryan101
    • 3 years ago
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    Are we speaking of the force the rope is "feeling"?

  18. Ishaan94
    • 3 years ago
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    Yeah

  19. 101Ryan101
    • 3 years ago
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    OHHHHH

  20. Ishaan94
    • 3 years ago
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    I didn't draw the normal or perpendicular forces

  21. 101Ryan101
    • 3 years ago
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    but it says "what will be the force by the rope ON THE BLOCK.. lol so I thought that means, what the block is feeling>>

  22. Ishaan94
    • 3 years ago
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    R is the force for the block from the rope

  23. Ishaan94
    • 3 years ago
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    now take a careful look the only force that rope and block have is the R so hence r is the one were looking for

  24. 101Ryan101
    • 3 years ago
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    Is there a name for this type of problem so I can go concentrate on them?

  25. Ishaan94
    • 3 years ago
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    try Rop-mass.......... I don't know i didn't solve them much

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