Question

Both earth and moon are subjected to the gravitational force of the sun. as observed from the sun, the orbit of the moon
A. will be elliptical.
B. will not be strictly elliptical the total gravitational force on it is central.
C. os not elliptical but will necessarily be a closed curve.
D. deviates considerably from being elliptical due to influence of plants other than earth.

Answer 1

Correct Answer - B
Moon is revolving around earth in almost circular orbit. Sun exerts gravitational pull on both, earth and moon. When observed from sun, the orbit of the moon will not be stricly elliptical because the total gravitational force (i.e., force due to earth on moon and force due to sun on moon) is not central.