Asked by Sally

A weight lifter lifts a barbell from the ground, raises it at a constat velocity and holds it motionless over his head. How does the force of the lifter compare with the wieght of the barbell at different stages of the lift?
Answered by Anonymous
w=F*d
d= 0m
0J....no work
Answered by Anonymous
when the barbell is being lifted its weight is different than when it is stationary
Answered by Marinah
why don't you answer it yourself?
Answered by Anonymous
A weight lifter lifts a 550 N weight 1.25 m over his head in 2.5 seconds. What is the power of the weight lifter?
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