What kind of work does a weightlifter do when lifting a barbell weighing 206 kg to a height of 2m?

To determine the work done by the weightlifter, we will use the formula: A = F * S = m * g * h (as can be seen from the formula, the weightlifter’s work is equal to the change in the potential energy of the barbell), where m is the weight of the barbell (m = 206 kg); g – acceleration due to gravity (g ≈ 10 m / s2); h is the height of the rod lift (h = 2 m).

Let’s calculate: A = 206 * 10 * 2 = 4.12 * 10 ^ 3 J (4.12 kJ).

Answer: The work of the weightlifter is 4.12 kJ.