# An athlete weighing 400 N lifted a barbell weighing 100 kilograms on his hands.

March 26, 2021 | education

| **An athlete weighing 400 N lifted a barbell weighing 100 kilograms on his hands. Find the force with which it acts on the ground.**

The force with which the athlete with the barbell acts on the surface of the earth corresponds to their gravity, which is equal to the weight of the athlete with the barbell and is calculated by the formula:

Ft = P = P1 + P2, where P1 is the weight of the athlete (P1 = 400 N), P2 is the weight of the bar (P2 = m * g, where m is the mass of the bar (m = 100 kg), g is the acceleration of gravity (we assume g = 10 m / s²)).

Ft = P1 + P2 = P1 + m * g = 400 + 100 * 10 = 400 + 1000 = 1400 N.

Answer: An athlete with a barbell acts on the ground with a force of 1400 N.

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