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

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If statement I is true but statement II is false

If both statement I and statement II are true but statement II is not the correct explanation of statement I.

If both statement I and statement II are true and statement II is the correct explanation of statement I.

If both statement I and statement II are false

answer is A.

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Detailed Solution

The torque on a body is given by $\vec{τ} = \frac{\vec{d L}}{d t}$

In case of planet orbiting around sun no torque is acting on it. $\frac{\vec{dL}}{dt} = 0 \Rightarrow \vec{L} = constant$

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