A homeowner wants to raise one end of an upright piano in order to place coasters under the wheels. it takes 1.6 x 10*3 n to raise one end of the piano, but the maximum force the homeowner can apply is 4.0 x 10*2 n. to accomplish the task, she places a fulcrum 0.30 m from the piano and uses a strong board as a first-class lever to raise the piano. calculate the minimum length of the effort arm requires to lift the piano? find the total length of the board? if she applied her effort further from the fulcrum, would the effort increase or decrease?

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