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  1. #1
    Newbie
    Joined
    May 2005
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    Christchurch kiwiland
    Posts
    7

    Levers

    Please help me with this...

    Find the force required to vertically raise a 200kg load using a crowbar that has a total length of 1.5 meters if the fulcrum point is 50mm from the load point.

    I have the following formula:

    Force 1.distance 1 = Force 2.distance2

    Thanks a lot for your help!
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  2. #2
    Site Founder Math Help's Avatar
    Joined
    Apr 2005
    Posts
    171
    F1 * D1 = F2 * D2
    F1 = ?
    D1 = Distance between F1 and fulcrum
    F2 = Weight of 200kg mass
    D2 = Distance between Mass and fulcrum

    Figure out D1, F2 and D2 (in meters and newtons) to find F1

    D1 = 1.5m - 50mm
    D1 = 1.5m - (50mm)(1m/1000mm)
    D1 = 1.5m - .05m
    D1 = 1.495m

    F2 = Weight of 200Kg = 200N

    D2 = 50mm
    D2 = (50mm)(1m/1000mm)
    D2 = .05m

    Now use the initial equation: F1 * D1 = F2 * D2
    F1 * 1.495m = 200N * .05m
    F1 = (200N * .05m)/1.495m
    F1 = 6.69 Newtons
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