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geerky42 Group Title

i have question

  • one year ago
  • one year ago

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  1. geerky42 Group Title
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    heres the FBD of a block acceleration at friction horizontal surface: |dw:1349649866061:dw|

    • one year ago
  2. geerky42 Group Title
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    my question is how does it affect the free body diagram if i place smaller block in front of it like this: |dw:1349649924401:dw| assume F is so big that the smaller block does not to fall? Do it has any force against F? Please explain it to me.

    • one year ago
  3. Fellowroot Group Title
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    How can the smaller block not fall?

    • one year ago
  4. imron07 Group Title
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    |dw:1349650550178:dw|

    • one year ago
  5. geerky42 Group Title
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    there is a friction between two blocks assume force applied to bigger block is so high that the friction prevents smaller block from falling. Is it possible? idk haha

    • one year ago
  6. geerky42 Group Title
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    and the FBD of smaller block is this, right? |dw:1349650685060:dw|

    • one year ago
  7. geerky42 Group Title
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    or should normal force face to the left? why?

    • one year ago
  8. imron07 Group Title
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    Correct :)

    • one year ago
  9. imron07 Group Title
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    No, the normal force is in correct direction.

    • one year ago
  10. geerky42 Group Title
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    what i dont understand is shouldnt second normal force from block 1 and 2 cancel each other out?

    • one year ago
  11. geerky42 Group Title
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    so it shouldnt exist?

    • one year ago
  12. imron07 Group Title
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    N, it does not cancel each other. The forces act in different object.

    • one year ago
  13. geerky42 Group Title
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    oic thank. you didnt answer this question: is it possible for force applied to bigger block to be so high that friction can prevents smaller block from falling?

    • one year ago
  14. imron07 Group Title
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    I was going to answer that. Yes, it is possible. The magnitude of normal force on smaller block actually depend on magnitude of the force acted on large block. The larger the force, the larger normal force on smaller block. If the normal force on smaller block large enough, the friction is large too (f=uN). The friction prevents block from falling.

    • one year ago
  15. Fellowroot Group Title
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    is it possible for force applied to bigger block to be so high that friction can prevents smaller block from falling? Theoretically I'm sure its true. In real life hmmmm. Let me think. I guess if you think of the friction between them to be so great that them being together is like Velcro then sure.

    • one year ago
  16. geerky42 Group Title
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    ok thanks, everyone, it was great helpful :)

    • one year ago
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