Balancing physics problem?Physics balancing problem?

Physics balancing problem?

It says "A 2kg mass is 5m away from the fulcrum of a see-saw. Where must a 3kg mass be placed to balance the see-saw?

please help

can you guys explain how you did it please?

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  • 9 years ago
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    Clockwise moment has to be balanced by an anticlockwise moment so:

    Let the distance the 3 kg mass has to be from the fulcrum = x

    Moment = force x perpendicular distance from fulcrum

    2 * 9.8 * 5 = 3 * 9.8 * x

    x = 10/3

    x = 3 1/3 m from the fulcrum on the opposite side to the 2 kg mass

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