KCET 2025 | Gravitation Question 1 | Physics

If $r_p, v_p, L_p$ and $r_a, v_a, L_a$ are radii, velocities and angular momenta of a planet at perihelion and aphelion of its elliptical orbit around the Sun respectively, then

$r_p>r_a, v_p>v_a, L_a>L_p$

$r_p < r_a, v_p > v_a, L_a=L_p$

$\mathrm{r}_{\mathrm{p}} > \mathrm{r}_{\mathrm{a}}, \mathrm{v}_{\mathrm{p}} < \mathrm{v}_{\mathrm{a}}, \mathrm{L}_{\mathrm{a}}=\mathrm{L}_{\mathrm{p}}$

$\mathrm{r}_{\mathrm{p}} < \mathrm{r}_{\mathrm{a}}, \mathrm{v}_{\mathrm{p}} < \mathrm{v}_{\mathrm{a}}, \mathrm{L}_{\mathrm{a}} < \mathrm{L}_{\mathrm{p}}$

KCET 2025

MCQ (Single Correct Answer)

-0

The total energy of a satellite in a circular orbit at a distance $(R+h)$ from the centre of the Earth varies as [ $R$ is the radius of the Earth and $h$ is the height of the oribit from Earth's surface]

$-\frac{1}{(\mathrm{R}+\mathrm{h})}$

$\frac{1}{(R+h)^2}$

$-\frac{1}{(R+h)^2}$

$\frac{1}{(\mathrm{R}+\mathrm{h})}$

KCET 2024

MCQ (Single Correct Answer)

-0

What is the value of acceleration due to gravity at a height equal to half the radius of the Earth, from its surface ?

$4.4 \mathrm{~ms}^{-2}$

$6.5 \mathrm{~ms}^{-2}$

Zero

$9.8 \mathrm{~ms}^{-2}$

KCET 2023

MCQ (Single Correct Answer)

-0

When a planet revolves around the Sun, in general, for the planet

linear momentum and linear velocity are constant.

linear momentum and areal velocity are constant.

kinetic and potential energy of the planet are constant.

angular momentum about the Sun and areal velocity of the planet are constant.

KCET Subjects