Homework Help: physical science

Posted by tracey on Wednesday, September 19, 2012 at 4:11pm.

a weightlifter raises a 70 kg barbell from the floor to a height of 2.2m in 1.2s. What was his average power output during the lift?

physical science - Aljebeth, Saturday, September 22, 2012 at 9:27am
Power=work/time
Work=force*distance
w=(9.81m/s*70kg)*2.2m
w=1510.74 Newton

P=1510.74N/1.2s
P=1259.95 watts or 1.26 Kilowatts
physical science - Aljebeth D. Tura, Saturday, September 22, 2012 at 9:51am
the unit for work should be Joule,nut newton..
physical science - Aljebeth D. Tura, Saturday, September 22, 2012 at 9:51am
the unit for work should be Joule,not newton..

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