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October 21, 2014

October 21, 2014

Posted by **Blessig iliya** on Wednesday, October 12, 2011 at 4:05pm.

- physics -
**Henry**, Thursday, October 13, 2011 at 9:01pmFb = mg = 100kg * 9.8N/kg = 980N. = Force of the boxes.

Po = Fb*d / t = 980 * 20 / 20 = 980W. =

Power output.

Eff. = (Po / Pi)* 100%,

Eff. = (980 / 1200) * 100% = 81.67%.

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