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January 30, 2015

January 30, 2015

Posted by **Glenn** on Saturday, October 24, 2009 at 8:16pm.

- science -
**Glenn**, Saturday, October 24, 2009 at 8:18pmhow much work is done by a crane that lowers 1,000 newtons of material a distance of 150 medters?

- science -
**sherrie**, Saturday, October 24, 2009 at 8:22pma student who weighs 500 newtons climbed the stairs from first floor third to the third floor,15 meters above in 20 seconds

how much work did she do?

what was her power?

- science -

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