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A weightlifter raises a 200-kg barbell to a height of 2.17 meters. What is the increase in the potential energy of the barbell?

Question

A weightlifter raises a 200-kg barbell to a height of 2.17 meters. What is the increase in the potential energy of the barbell?

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Solution

To calculate the increase in potential energy, we can use the formula for gravitational potential energy which is:

PE = mgh

where: PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height the object is lifted.

In this case, the mass m is 200 kg, the acceleration due to gravity g is approximately 9.8 m/s² (on Earth), and the height h is 2.17 m.

Substituting these values into the formula gives:

PE = 200 kg * 9.8 m/s² * 2.17 m = 4246.6 Joules

So, the increase in the potential energy of the barbell is 4246.6 Joules.

This problem has been solved

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