The athlete lifted a 75kg barbell to a height of 2m. What potential energy does the barbell have?

To find the potential energy acquired by the taken barbell after lifting, we will use the formula: En = m * g * h.

Constants and variables: m – weight of the lifted rod (m = 75 kg); g – acceleration due to gravity (g ≈ 10 m / s2); h – lifting height (h = 2 m).

Calculation: Ep = m * g * h = 75 * 10 * 2 = 1.5 * 10 ^ 3 J = 1.5 kJ.

Answer: After lifting, the bar will acquire a potential energy of 1.5 kJ.