To calculate the force with which the athlete, after lifting the barbell, must press on the floor, we will use the formula: F = P = m * g = (mс + mш) * g.
Variables and constants: mс – the own weight of the athlete (mс = 80 kg); msh – the mass of the lifted rod (mw = 150 kg); g – acceleration due to gravity (g ≈ 10 m / s2).
Calculation: F = (mc + mw) * g = (80 + 150) * 10 = 230 * 10 = 2.3 * 10 ^ 3 H = 2.3 kN.
Answer: After lifting the barbell, the athlete’s pressure on the floor will be 2.3 kN.
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