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Question Number 11966 by tawa last updated on 07/Apr/17

$$\mathrm{If}\mathrm{a}\mathrm{force}\mathrm{of}200\mathrm{N}\mathrm{is}\mathrm{used}\mathrm{to}\mathrm{pull}\mathrm{a}\mathrm{block}\mathrm{of}\mathrm{mass}30\mathrm{kg}\mathrm{up}\mathrm{a}\mathrm{plane}\mathrm{inclined}$$$$\mathrm{at}60°\mathrm{to}\mathrm{the}\mathrm{horizontal}\mathrm{at}\mathrm{a}\mathrm{steady}\mathrm{speed}.\mathrm{Calculate}\mathrm{the}\mathrm{percentage}\mathrm{efficiency}$$$$\mathrm{of}\mathrm{the}\mathrm{incline}\mathrm{plane}.$$

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