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Science Physics

Ms. Sue could you please explain this to me. Imagine you need to deliver a piano over three steps. A longer ramp translates into less force necessary to raise the piano's height than a shorter ramp would require. Calculate the percentage smaller a force would be required using an 2.8m long ramp compared to a 0.9m ramp?

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  1. Work=F*d

    So,

    Work=F1*2.8m

    Work=F2*0.9m

    F2*2.8m=F1*0.9m

    F2/F1=0.9m/2.8m

    (0.9m/2.8m)*100=32.4%

    F2 is 32.4% of F1

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  2. The first post probably wasn't that clear

    F1=force of 2.8m ramp

    F2=force of 0.9m ramp

    Work=F*d

    So,

    Work=F1*2.8m

    Work=F2*0.9m

    F1*2.8m=F2*0.9m

    F1/F2=0.9m/2.8m

    (0.9m/2.8m)*100=32.4%

    F1is 32.4% of F2

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