The motion of planets in the solar system in an example of conservation of

Options

A. mass
B. momentum
C. angular momentum
D. kinetic energy

Answer

C

Explanation

From Kepler's second law of motion, a line joining any planet to the sun sweeps out equal areas in equal intervals of time.
Let L be angular momentum, `I` the moment of inerti and `m` the mass, then
`L = I omega = mr^(2) omega`
`:. (dA)/(dt)=(L)/(2m)=` constant
Hence, angular momentum of the planet is conserved.