Advertisements
Advertisements
प्रश्न
In the following, what are the quantities which that are conserved?
विकल्प
Linear momentum of planet
Angular momentum of planet
Total energy of planet
Potential energy of a planet
उत्तर
Total energy of planet
Explanation:
Since there is a net force acting on the planet, its velocity changes which mean its linear momentum changes. In fact, the absolute value of linear momentum changes too since the planet’s speed is variable as it goes around in its elliptical orbit. So the linear momentum of the planet is not conserved. But the angular momentum about the sun is conserved. Since the torque of gravitational force is zero.
The total mechanical energy remains constant for isolated system objects that interact with conservative forces. So, the total energy of the system of planet is conserved. The single energy of the planet is not conserved.
APPEARS IN
संबंधित प्रश्न
The time period of a satellite orbiting Earth in a circular orbit is independent of
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are KA, KB and KC respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
The kinetic energy of the satellite orbiting around the Earth is __________.
What is meant by escape speed in the case of the Earth?
What are geostationary and polar satellites?
Define weight
How will you prove that Earth itself is spinning?
Explain in detail the idea of weightlessness using the lift as an example.
An unknown planet orbits the Sun with a distance twice the semi-major axis distance of the Earth’s orbit. If the Earth’s time period is T1, what is the time period of this unknown planet?
Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. Calculate the speed of each particle.
