Calculate the power of a weight lifter when a 614.7 N barbell is lifted 4.48 m in 27.4 seconds

The power of a weightlifter is 100.5 Watt.

Explanation:

Power is the rate at which the work is done. It can also be defined as the amount of energy converted or transferred in to other forms per unit time. Mathematically,

Power=Workdone/Timetaken

In this case, work is done by lifting the 614.7 N barbell against gravity given by the potential energy. Potential Energy = mgh = Force * distance = 614.7*4.48=2753.85 J. Now, Power = Workdone/Timetaken = 2753.85/27.4=100.5 Watts

Therefore, the power of a weight lifter when a 614.7 N barbell is lifted 4.48 m in 27.4 seconds is 100.5 Watt.