Power lifter Paul lifts a 700.0kg barbell 2.00m in 0.400s. How much power did Paul develop?

Work = (force) x (distance.

The force required to lift the load is its weight.

Weight = (mass) x (gravity)

so Work = (mass) x (gravity) x (distance)

Now Power = (work) / (time)

so Power = (mass) x (gravity) x (distance) / (time)

= (700kg) x (9.8 m/s²) x (2 m) / (0.4 sec)

= (700 x 9.8 x 2) / (0.4) (kg-m²/sec²) / (sec)

= (34,300) (joule) / (sec)

= 34,300 watts.

This is one of those exercises where the math and the physics

are air-tight and bullet-proof but the answer is absurd.

34,300 watts is about 46 horsepower. I don't care how many

Wheaties Power Lifter Paul had for breakfast today, he is NOT

snatching a barbell that weighs 1,543 pounds (0.77 ton!)

to the height of the top of his head in less than 1/2 second!

34,335 W

P = mgh/t

P=700*2*9.81/.4