Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2011PhysicsGravitationActual

A planet moving along an elliptical orbit is closest to the sun at a distance r₁ and farthest away at a distance of r₂ . If y₁ and v₂ are the linear velocities at these points respectively, then the ratio y₁ y₂ is

Options

  1. Ar₂ / r₁
  2. B(r₂ / r₁ )^2
  3. Cr₁ / r₂
  4. D(r₁ / r₂ )^2

Correct answer

A. r₂ / r₁

Step-by-step solution

From the law of conservation of angular momentum gathered m r₁ y₁=m r₂ y₂ r₁ y₁=r₂ y₂ y₁ y₂ = r₂ r₁ gathered

Practice Gravitation on Quantrex Academy →

More from Gravitation

The amount of work done to raise a mass ' m ' from the surface of the Earth to a height equal to the radius of the Earth ' R ', will be : 2026Two planets P₁ and P₂ with equal mass have radii R₁ and R₂ , respectively, where R₂= R₁ 2 . The escape speeds of P₁ and P₂ are v₁ and v₂ , respectively. Then v₂ v₁ is : 2026In a solar system, the time-period of revolution of a planet tracing a circular orbit of radius R is proportional to : 2026The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of Mercury. The Martian year is 687 Earth days. Then which of the following is the length of 1 y 2025A body weighs 48 N on the surface of the earth. The gravitational force experienced by the body due to the earth at a height equal to one-third the radius of the earth from its sur 2025The 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: 2024The mass of a planet is 1 10 th that of the earth and its diameter is half that of the earth. The acceleration due to gravity on that planet is: 2024An 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) 2024 Full Gravitation list All NEET PYQs