A student wants to lift a 250 N bucket of water up from the bottom of a well using a wheel and axle. The wheel has a radius of 75 cm, and th

Question

A student wants to lift a 250 N bucket of water up from the bottom of a well using a wheel and axle. The wheel has a radius of 75 cm, and the axle has a radius of 20 cm. How much force will the student need to provide to the wheel to turn it and lift the bucket?
A. 66.7 N
B. 37.5 N
C. 1667 N
D. 938 N

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Thanh Thu 3 years 2021-08-21T13:16:04+00:00 2 Answers 8 views 0

Answers ( )

  1. MichaelMet
    0
    2021-08-21T13:17:26+00:00
    Reply

    I guess it would be D

  2. minhkhoi
    0
    2021-08-21T13:17:34+00:00
    Reply

    Answer:

    66.7 N

    Explanation:

    F(input) x r(input) = F(output) x r(output)

    r=radius for wheel and axle problems

    F=force

    Because it asks for the force on the wheel, we would have the missing variable with the radius of the wheel. Let x be the missing output force. So by plugging in the givens we get:

    (250 N) x (20 cm) = x (75 cm)

    x= 66.7 N

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