Sunita use a lever of length sm to ligt a piece of stone weighing
1000N. If the distance of the load from the fulcrum is Im, hoss
much effort does she apply to lift the piece of stone? [Ans:250]
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Answer:
Answer-
( identity : (a-b)² = a²-2ab +b²)
= {(2x - 5y)}^{2}=(2x−5y)
2
= {(2x)}^{2} - 2(2x)(5y) + {(5y)}^{2}=(2x)
2
−2(2x)(5y)+(5y)
2
= 4 {x}^{2} - 20xy + 25 {y}^{2}=4x
2
−20xy+25y
250
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