The motion of planets in the solar system is | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The gravitational force exerted by the Sun on a planet is a central force. $A$ central force is always directed towards or away from a fixed point

Vedclass · Accepted Answer

Conservation of angular momentum

Vedclass · Answer

(C) The gravitational force exerted by the Sun on a planet is a central force. $A$ central force is always directed towards or away from a fixed point (the center of the Sun). The torque $\vec{	au}$ exerted by a central force about the center of force is given by $\vec{	au} = \vec{r} 	imes \vec{F}$. Since the force $\vec{F}$ is parallel to the position vector $\vec{r}$,the cross product $\vec{r} 	imes \vec{F} = 0$. Because the torque is zero,the angular momentum $\vec{L}$ of the planet remains constant over time. Therefore,the motion of planets in the solar system is governed by the law of conservation of angular momentum.

The motion of planets in the solar system is governed by which of the following conservation laws?

Similar Questions

The Earth moves around the Sun in an elliptical orbit as shown in the figure. The ratio $OA/OB = x$. The ratio of the speed of the Earth at $B$ to that at $A$ is nearly

At which height from the surface of the Earth does a polar satellite revolve around the Earth?

Which of the following quantities remains constant for a satellite in an orbit?

Two stars of masses $m_1$ and $m_2$ are parts of a binary star system. The radii of their orbits are $r_1$ and $r_2$ respectively,measured from the centre of mass of the system. The magnitude of the gravitational force that $m_1$ exerts on $m_2$ is

The rotation period of an earth satellite close to the surface of the earth is $83$ minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be .......... $\min$

Vedclass Test Series

Exam Paper Generator

Online Exam Module