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Don't forget!!
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W=F.d
W=Fd Cosθ
When θ=Zero, W is maximum
When θ=90, W is Zero
When 0<θ<90, W is positive
When 180>θ>90, W is negative
When θ=180, W is negative
In graph we use the law W=Length x Width
Work done when pushing an object forwards is greater than dragging it behind.
James Joule is an English scientist who was the first to realize that work can generate heat. As during one of his experiments, he found the water at the bottom of a waterfall is higher than the top so he concluded that a part of water energy is converted into heat.
When there's someone lifting something upstairs wh an angle, we should use the inclined angle in this case, Where the inclined angle=90∘_θ
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- Note on Don't forget!!, created by Rania Maamoun on 26/07/2020.
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- Rania Maamoun
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