The torque on a planet about the centre of sun is

A: The speed of a planet is maximum at perihelion . R : The angular momentum of a planet about centre of sun is conserved .

A particle describes uniform circular motion. Find the torque on it about the centre of the circle.

A particle describes uniform circular motion. Find the torque on it about the centre of the circle.

Assertion : In planetary motion angular momentum of planet about centre of sun remains constant. But linear momentum of system does not remain constant. Reason : Net torque on planet any point is zero.

Assertion : In planetary motion angular momentum of planet about centre of sun remains constant. But linear momentum of system does not remain constant. Reason : Net torque on planet any point is zero.

The rate of change of angular momentum of a system of particles about the centre of mass is equal to the sum of external torque about the centre of mass when the centre of mass is :

The rate of change of angular momentum of a system of particles about the centre of mass is equal to the sum of external torque about the centre of mass when the centre of mass is :

The time of revolution of planet A round the sun is 8 times that of another planet B . The distance of planet A from the sun is how many B from the sun