Question

What is the average power output of an athlete who can life 9.0 * 10^2 kg 2.5 m in 2.0 s?

Answer 1

Answer:

Average power output of athlete = 11025 Watts

Explanation:

Work done is defined as the product of force applied and the displacement perpendicular to the force.

Work = $Force\times Displacement$

Power is defined as work done per unit time.

Power = $\frac{Work done}{Time}$

Here the person lifts 900 kg.

Height = 2.5 m

Time interval = 2 seconds

Force = $weight \times gravity$

          = $900 \times 9.8$

          = 8820 N

Work done = $Force\times Displacement$

                   = $8820 \times 2.5$

                   = 22050 J

Power = $\frac {22050}{2}$

           = 11025 Watt