Assertion: Angular speed of a planet around the sun increases, when it is closer to the sun. Reason: Total angular momentum of the system remains constant.

Question

Assertion: Angular speed of a planet around the sun increases, when it is closer to the sun. Reason: Total angular momentum of the system remains constant. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

According to law of conservation of angular momentum, when sum of external torques acting on a system is zero, then the total angular momentum of the system remains constant.

τ = 0, L = I ω =

Constant
If

I

increases,

ω

decreases and vice versa.

Q. Assertion: Angular speed of a planet around the sun increases, when it is closer to the sun. Reason: Total angular momentum of the system remains constant.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

According to law of conservation of angular momentum, when sum of external torques acting on a system is zero, then the total angular momentum of the system remains constant. τ=0,L=Iω= Constant If I increases, ω decreases and vice versa.

Q. Assertion: Angular speed of a planet around the sun increases, when it is closer to the sun.
Reason: Total angular momentum of the system remains constant.

According to law of conservation of angular momentum, when sum of external torques acting on a system is zero, then the total angular momentum of the system remains constant.
$τ = 0, L = I ω =$ Constant
If $I$ increases, $ω$ decreases and vice versa.