Question

Тело поднятое над землей на высоту 2 м, имеет потенциальную энергию 40 Дж. Какова масса этого тела, если нуль отчета потенциальной энергии находится на поверхности земли.

Answer 1

E=mgh     m=E\gh       m=40\20=2 кг

Answer 2

Calculation of Mass of the Body

To calculate the mass of the body, we can use the formula for potential energy:

Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h)

Given that the potential energy of the body is 40 J and the height is 2 m, we can rearrange the formula to solve for mass:

m = PE / (g × h)

Substituting the given values:

m = 40 J / (9.8 m/s^2 × 2 m)

Now we can calculate the mass of the body:

m = 2.04 kg

Therefore, the mass of the body is approximately 2.04 kg.