In planetary motion:
Correct answer: B. The total angular momentum remains constant
- A. The angular speed remains constant
- B. The total angular momentum remains constant
- C. The linear speed remains constant
- D. Neither the angular momentum nor angular speed remains constant
Explanation
Statement B is close to being true. According to Kepler's laws, the total angular momentum of a planet remains constant during its motion around the Sun. The law of conservation of angular momentum states that in the absence of external torques, the total angular momentum of a system remains constant.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Gravitation
Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
Practise Gravitation
265 free Gravitation MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Gravitation questions
If the radius of Earth were to shrink by one percent, its mass remaining the same, the acceleration due to gravity on the Earth's surface would:
Which of the following is the evidence to show that there must be force acting on Earth and directed towards the Sun?
There is a body lying on the surface of the Earth and suppose the Earth suddenly loses its power of attraction then:
The escape velocity of an object projected from the surface of a given planet is independent of:
The southern Hemisphere of Earth is "up side down", but the people living there do not fall off the Earth because:
Newton's law of gravitation is universal because: