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February 28, 2015

February 28, 2015

Posted by **t** on Thursday, June 23, 2011 at 2:19pm.

- physical science -
**drwls**, Thursday, June 23, 2011 at 2:34pmThe work required is

M*g*H = 1000*9.81*40 = 3.92*10^5 Joules

A 20 HP motor can provide 20*746 = 14,920 watts (J/sec) of power.

Time= Work/Power

I get 26.3 seconds

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