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Assertion: For the plantes orbiting arou...

Assertion: For the plantes orbiting around the sun, angular speed, linear speed, K.E. changes with time, but angular momentum remains constant.
Reason: No torque is acting on the rotating planet. So its angular momentum is constant.

A

If both the assertion and reason are true and reason is a true explantion of the assertion.

B

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

C

If the assertion is true but reason false

D

If both the assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
The torque on a body is given by `vec(tau)=(dvecL)/(dt)`
In case of planet orbiting aroun sun no torque is acting on it, `(dvecL)/(dt)=0 implies vecL`=constant.
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