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Math Help - please help -very urgent

  1. #1
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    please help -very urgent

    1>how much time will it take for an object to fall to earth from 2000ft.

    2>In a register are 20 bills(fives and tens) worth $200.how many are fives in the register
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  2. #2
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    answers

    Quote Originally Posted by bobby77
    1>how much time will it take for an object to fall to earth from 2000ft.

    2>In a register are 20 bills(fives and tens) worth $200.how many are fives in the register
    1>sorry, I have to do it in metres (2000ft=609.6m)
    d=1/2gt^2
    609.6=1/2x9.8xt^2
    t=11.154 sec (approx)

    2>No fives... 20x10=200
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  3. #3
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    Quote Originally Posted by Sophie
    1>sorry, I have to do it in metres (2000ft=609.6m)
    d=1/2gt^2
    609.6=1/2x9.8xt^2
    t=11.154 sec (approx)

    2>No fives... 20x10=200
    To do 1> in English units, replace g with 32 ft/s^2.

    -Dan
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