Physics - Rotation Question with Solution | TestHub

A planet revolves around the sun, is an elliptical orbit under the effect of gravitational pull on the planet.So, torque, $C=r\times F=rF\sin 180^{\circ }n=0$ $$\text{As }\mathrm{C}=\frac{\mathrm{dL}}{dt};\mathrm{soL}=\mathrm{a}\text{ constant }$$ $\Rightarrow$ Angular momentum is constant.