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anonymous

  • one year ago

An object moves in uniform circular motion at 25 m/s and takes 1.0 second to go a quarter circle. What is the radius of the circle ? helpppppp me

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  1. anonymous
    • one year ago
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    If it takes 1 second to go a quarter circle, it takes 4 seconds to go the whole circle. The circumference of the circle is the distance traveled, so that's \(2\pi r\). \[v=\frac{2\pi r}{T}\] where v = 25 m/s and T = 4.0 s Solve for r

  2. anonymous
    • one year ago
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    heres the thing i know that it takes 4 second to go the whole circle and i know thats the formula but idk how to plug them i keep getting wrong numbers :(

  3. anonymous
    • one year ago
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    @peachpi

  4. anonymous
    • one year ago
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    put up what you have so I can see what you're doing

  5. anonymous
    • one year ago
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    4x25 =100 for a whole circle

  6. anonymous
    • one year ago
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    idk im lost

  7. anonymous
    • one year ago
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    (2xpix4)/1 ??

  8. anonymous
    • one year ago
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    v is the velocity, so plug in 25 for v T is the time, that's 4 You should have this.\[25=\frac{ 2\pi r }{ 4 }\]

  9. anonymous
    • one year ago
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    r is what you're solving for

  10. anonymous
    • one year ago
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    so multiply both sides by 4 to get \(100=2\pi r\)

  11. anonymous
    • one year ago
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    Now divide both sides by \(2\pi\) and let me know what you get

  12. anonymous
    • one year ago
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    i got 0.062

  13. anonymous
    • one year ago
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    oh no i mean 157.07

  14. anonymous
    • one year ago
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    I got 15.9

  15. anonymous
    • one year ago
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    see 0.06 is one of my answers but 157.07 is not and that what i had gotton before you come to help me

  16. anonymous
    • one year ago
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    Is that one of your answers?

  17. anonymous
    • one year ago
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    how you got 15.9 ?

  18. anonymous
    • one year ago
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    I have 16 in my answers i just need know how you got it so i would do it myself next time please

  19. anonymous
    • one year ago
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    multiply 2π first then divide 100 by that 100/(2π) = 100/6.28 = 15.9

  20. anonymous
    • one year ago
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    yeah it would be 16 to 2 sig figs

  21. anonymous
    • one year ago
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    oh thats explains it yeah i put them all together in the calc and thats why it gave me 157 THANK you so MUCH

  22. anonymous
    • one year ago
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    you're welcome.

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