Tuesday, August 7, 2012

Final 8 - Cable Car Power


Given:

  • $ \mbox{A 2,000 kg cable car on an alpha 10 degree slope.} $

Question:

  • $\mbox{How much power does it take to move the trolley at 25 km/hour?} $

Rationale:

  • $25 \dfrac{km}{hour} = 25 \dfrac{1000 \mbox{meters-per-km}}{3600 \mbox{seconds-per-hour}} $
    •  $25 \dfrac{km}{hour} =6.944444 \; \mbox{meters per second} $
  • $ P = F_{parallel} V = m g \sin\alpha V$

Calculate:

  • $P = (2000) (10) (.173648178) (6.9444) = 24,117.648146 $
    •  $ P = \approx 24,117 $

References:

  • $ $

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