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The floor of a lorry is 2m high,a plank 5m long is use as an...

The floor of a lorry is 2m high,a plank 5m long is use as an incline plane to raise a load of 200N,if the efficiency of the machine is 70%.Calculate the effort needed to raise the load up the plane.?
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Asked by EMMANUEL EDMOND on 1st August, 2020
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