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izzy777

  • 2 years ago

please helpppp!!! Robin pulls a rope attached to a sled with a force of 50 N. The rope makes an angle of 30° with the ground, as shown below. What force will move the sled vertically upwards? 183.4 N 25 N 43.3 N 100 N

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  1. izzy777
    • 2 years ago
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  2. ganeshie8
    • 2 years ago
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    50/sin 30

  3. izzy777
    • 2 years ago
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    wait i dont get it?

  4. ganeshie8
    • 2 years ago
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    by applying 50N at an angle of 30 degrees, the sled is sliding horizontally, right ?

  5. izzy777
    • 2 years ago
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    yes

  6. ganeshie8
    • 2 years ago
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    so, if we apply the same force vertically, the slide will move up vertically

  7. ganeshie8
    • 2 years ago
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    |dw:1340941337117:dw|

  8. ganeshie8
    • 2 years ago
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    so, we need to calculate the value of "x" for which the vertical component becomes "50"

  9. ganeshie8
    • 2 years ago
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    use trigonometry and find..

  10. izzy777
    • 2 years ago
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    i don't know how to solve it...

  11. izzy777
    • 2 years ago
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    im so confused

  12. ganeshie8
    • 2 years ago
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    see the angle 30 once. can you tell whats the opposite side for that angle ?

  13. izzy777
    • 2 years ago
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    well one of the angles = 90 degrees the other one has to be60

  14. ganeshie8
    • 2 years ago
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    |dw:1340941561296:dw|

  15. ganeshie8
    • 2 years ago
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    \(\huge sin\ 30 = \frac{50}{x}\)

  16. ganeshie8
    • 2 years ago
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    \(\huge x = \frac{50}{sin\ 30} = 100N\)

  17. ganeshie8
    • 2 years ago
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    hope it is clear now... ?

  18. izzy777
    • 2 years ago
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    yes! i think i get it now :) thank you so much can you help me with one more question?

  19. ganeshie8
    • 2 years ago
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    sure..

  20. izzy777
    • 2 years ago
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    A force of 8 N is exerted on a box. The component of this force which acts along the ground has a magnitude of 6.93 N, as shown below. What is the measure of angle x? 40° 50° 60° 30°

  21. izzy777
    • 2 years ago
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  22. ganeshie8
    • 2 years ago
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    use cosine

  23. izzy777
    • 2 years ago
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    ?

  24. ganeshie8
    • 2 years ago
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    cos x = adj/hyp = 6.93/8 x = cos^-1(6.93/8) degrees

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