Question:
A comet orbits around Sun in an elliptical orbit. Which of the following quantities remains constant during the course of its motion?
A comet orbits around Sun in an elliptical orbit. Which of the following quantities remains constant during the course of its motion?
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In central force motion, angular momentum is always conserved.
Updated On: May 1, 2026
- Linear velocity
- Angular velocity
- Angular momentum
- Kinetic energy
- Potential energy
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The Correct Option is C
Solution and Explanation
Concept:
For central forces (like gravity), torque is zero, so angular momentum is conserved.
Step 1: Nature of gravitational force.
Force acts along the line joining comet and Sun.
Step 2: Torque.
\[ \tau = \vec{r} \times \vec{F} = 0 \]
Step 3: Consequence.
\[ \text{Angular momentum remains constant} \]
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