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