Question

Дам 40 балів вкажіть чим зумовлена ​​енергія тіла (координатою, швидкістю або координатою швидкістю) у випадках: 1.шайба ковзає по льоду без трення. 2.пружина запнає деформації 3.камінь вільно падає. 4.люстра висити під стелею. 5. маятник здійснює коліваня

Answer 1

Ответ:

г)люстра висить під стелею

Answer 2

Factors determining the energy of an object

The energy of an object can be determined by various factors, including its position (coordinate), velocity, or both. Let's examine each of the given scenarios to understand how the energy of the object is influenced.

1. A puck sliding on ice without friction: In this case, the energy of the puck is determined by its position (coordinate) and velocity. As the puck slides on the ice without any friction, its kinetic energy remains constant throughout its motion. The kinetic energy of an object is given by the formula: KE = (1/2)mv^2, where m is the mass of the object and v is its velocity [[1]].

2. A spring undergoing deformation: When a spring is compressed or stretched, it stores potential energy due to its deformation. This potential energy is determined by the displacement (coordinate) of the spring from its equilibrium position. The potential energy stored in a spring is given by the formula: PE = (1/2)kx^2, where k is the spring constant and x is the displacement of the spring from its equilibrium position [[2]].

3. A stone freely falling: In this scenario, the energy of the stone is determined by its position (coordinate) and the conversion of potential energy to kinetic energy. As the stone falls freely under the influence of gravity, its potential energy decreases while its kinetic energy increases. At the highest point, the stone has maximum potential energy, and as it falls, the potential energy is converted into kinetic energy. The total mechanical energy (potential energy + kinetic energy) of the stone remains constant throughout its fall, neglecting air resistance [[3]].

4. A chandelier hanging from the ceiling: The energy of the chandelier in this case is determined by its position (coordinate) relative to the ceiling. The chandelier has gravitational potential energy due to its height above the ground. The potential energy of the chandelier is given by the formula: PE = mgh, where m is the mass of the chandelier, g is the acceleration due to gravity, and h is the height of the chandelier above the ground [[4]].

5. A pendulum oscillating: The energy of a pendulum is determined by its position (coordinate) and the conversion of potential energy to kinetic energy as it oscillates. At the highest point of its swing, the pendulum has maximum potential energy, which is converted into kinetic energy as it moves towards the lowest point. At the lowest point, the pendulum has maximum kinetic energy, and the process repeats as it swings back and forth. The total mechanical energy (potential energy + kinetic energy) of the pendulum remains constant throughout its oscillation, neglecting air resistance [[5]].

In summary, the energy of an object can be determined by its position (coordinate), velocity, or both, depending on the specific scenario. The energy can be in the form of kinetic energy, potential energy, or a combination of both, depending on the type of motion or deformation involved.

I hope this explanation helps! Let me know if you have any further questions.