Question

4. Позначте всі правильні відповіді. Які із зазначених тіл мають кінетичну енергію відносно поверхні Землі? (1 бал) а) Мотузка, за допомогою якої витягають із криниці відро з водою б) Супутник, який рухається по навколоземній орбіті в) Пружини амортизатора, стиснуті під дією вантажу г) Пасажир, який сидить у кабіні автомобіля, що рухається

Answer 1

Ответ:

Ответ А и В - обладают потениальной энергией упруго деформированного тела.

Объяснение:Ответ Б и Г - имеют кинетическую энергию относительно поверхности Земл

Answer 2

Correct Answers for Bodies with Kinetic Energy Relative to the Earth's Surface

The bodies that have kinetic energy relative to the Earth's surface are:

a) The rope used to pull a bucket of water out of a well. b) A satellite moving in a near-Earth orbit. c) The compressed springs of a shock absorber under the action of a load. d) A passenger sitting in a moving car.

Let's go through each option to understand why it has kinetic energy relative to the Earth's surface.

a) The rope used to pull a bucket of water out of a well: When the rope is pulled, it transfers the force to the bucket, allowing it to move upward. As the bucket moves, it gains kinetic energy due to its motion relative to the Earth's surface.

b) A satellite moving in a near-Earth orbit: Satellites in orbit around the Earth are constantly moving, and their motion gives them kinetic energy. This energy is necessary to counteract the gravitational force pulling them towards the Earth, allowing them to maintain their orbit.

c) The compressed springs of a shock absorber under the action of a load: When a load is applied to a vehicle's shock absorber, the springs compress. This compression stores potential energy in the springs. As the vehicle moves, the potential energy is converted into kinetic energy, allowing the vehicle to move relative to the Earth's surface.

d) A passenger sitting in a moving car: When a car is in motion, the passenger inside the car is also in motion relative to the Earth's surface. This motion gives the passenger kinetic energy.

These are the correct answers for bodies that have kinetic energy relative to the Earth's surface.