Question

Тело, масса которого 8 кг, находится на высоте 15 метров над землей. Подсчитать его потенциальную энергию относительно поверхности земли и крыши здания, высота которого 6 метров.

Answer 1

Ep1=m*g*h1=8*10*15=1200 Дж
Ep2=m*g*(h1-h2)=8*10*(15-6)=720 Дж

Answer 2

Ep1=m*g*h1=8*10*15=1200 Дж
Ep2=m*g*(h1-h2)=8*10*(15-6)=720 Дж вот такой вот ответ получается

Answer 3

Calculation of Potential Energy

To calculate the potential energy of an object, we can use the formula:

Potential Energy = mass * gravity * height

Given: - Mass of the object = 8 kg - Height above the ground = 15 meters

Let's calculate the potential energy of the object relative to the surface of the Earth and the roof of a building with a height of 6 meters.

1. Potential Energy relative to the surface of the Earth: - Gravity on Earth is approximately 9.8 m/s^2. - Using the formula, the potential energy relative to the surface of the Earth is: Potential Energy = 8 kg * 9.8 m/s^2 * 15 meters

2. Potential Energy relative to the roof of the building: - The height difference between the object and the roof of the building is 15 meters - 6 meters = 9 meters. - Using the formula, the potential energy relative to the roof of the building is: Potential Energy = 8 kg * 9.8 m/s^2 * 9 meters

Let's calculate the values:

1. Potential Energy relative to the surface of the Earth: - Potential Energy = 8 kg * 9.8 m/s^2 * 15 meters = 1176 joules

2. Potential Energy relative to the roof of the building: - Potential Energy = 8 kg * 9.8 m/s^2 * 9 meters = 705.6 joules

Therefore, the potential energy of the object relative to the surface of the Earth is 1176 joules, and the potential energy relative to the roof of the building is 705.6 joules.