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# (Solved): (b) A mechanic raises a $$1200 \mathrm{~kg}$$ car to check the components underneath by using an ...

(b) A mechanic raises a $$1200 \mathrm{~kg}$$ car to check the components underneath by using an automotive lift and raises the car $$2.0 \mathrm{~m}$$ above floor level. The hydraulic cylinder inside the automotive lift has a $$0.2 \mathrm{~m}$$ diameter piston and $$0.1 \mathrm{~m}$$ diameter rod. Determine: i) the work required to lift the car, $$W(\mathrm{~J})$$ ii) the required pressure, $$P$$ (Pa) iii) the power if the lift raises the car in $$15 \mathrm{~s}, \bar{W}(\mathrm{~W})$$ iv) the ascending speed of the lift if the flow rate is $$0.0005 \mathrm{~m}^{3} / \mathrm{s}, V(\mathrm{~m} / \mathrm{s})$$, and v) the flow rate for the lift to ascent in $$10 \mathrm{~s}, Q\left(\mathrm{~m}^{3} / \mathrm{s}\right)$$.

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