Question:
When earth moves round the sun, the quantity which remains constant is:
When earth moves round the sun, the quantity which remains constant is:
Updated On: Jun 20, 2022
- angular velocity
- kinetic energy
- potential energy
- areal velocity
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
When earth moves round the sun then according to Keplers second law, the radius vector drawn from the sun to earth, sweeps out equal areas in equal time, i. e., its areal velocity (or the area swept out by it per unit time) is constant. While in such motion, angular velocity, kinetic energy and potential energy change.
Was this answer helpful?
0
0
Top Questions on Gravitation
- An object of mass 100 kg falls from point A to B as shown in figure. The change in its weight, corrected to the nearest integer is ($R_E$ is the radius of the earth):
- NEET (UG) - 2024
- Physics
- Gravitation
- The escape velocity for earth is v. A planet having 9 times mass that of earth and radius, 16 times that of earth, has the escape velocity of:
- NEET (UG) - 2024
- Physics
- Gravitation
- A metal wire of uniform mass density having length L and mass M is bent to form a semicircular arc and a particle of mass m is placed at the centre of the arc. The gravitational force on the particle by the wire is:
- JEE Main - 2024
- Physics
- Gravitation
- A light planet is revolving around a massive star in a circular orbit of radius $R$ with a period of revolution $T$. If the force of attraction between the planet and the star is proportional to $R^{-\frac{3}{2}}$, then choose the correct option:
- JEE Main - 2024
- Physics
- Gravitation
- Assuming the earth to be a sphere of uniform mass density, a body weighed 300 N on the surface of earth. How much it would weigh at R/4 depth under surface of earth ?
- JEE Main - 2024
- Physics
- Gravitation
View More Questions
Questions Asked in BCECE exam
- Instantaneous displacement current of 1.0A in the space between the parallel plates of 1μF capacitor can be established by changing the potential difference of:
- BCECE - 2023
- Electromagnetic waves
- What is the r.m.s value of an alternating current which when passed through a resistor produces heat, which is four times that produced by a current of 2A in the same resistor?
- BCECE - 2023
- Alternating current
- In the displacement method of \(l_1\) and \(l_1\) be the sizes of two images, then the size of the object is:
- BCECE - 2023
- Ray optics and optical instruments
- A beaker is a field with water (μ=\(\frac{4}{3}\)) up to a height of 33.25cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25cm below the water level. The focal length of the mirror is nearly :
- BCECE - 2023
- Ray optics and optical instruments
- An air doubble is inside water (μ=\(\frac{4}{3}\)). At what distance from the air bubble should a point object be placed so as to form a real image at the same distance from the dubble? (r is the radius of curvature of the bubble)
- BCECE - 2023
- Ray optics and optical instruments
View More Questions
Concepts Used:
Gravitation
In mechanics, the universal force of attraction acting between all matter is known as Gravity, also called gravitation, . It is the weakest known force in nature.
Newton’s Law of Gravitation
According to Newton’s law of gravitation, “Every particle in the universe attracts every other particle with a force whose magnitude is,
- F ∝ (M1M2) . . . . (1)
- (F ∝ 1/r2) . . . . (2)
On combining equations (1) and (2) we get,
F ∝ M1M2/r2
F = G × [M1M2]/r2 . . . . (7)
Or, f(r) = GM1M2/r2
The dimension formula of G is [M-1L3T-2].