Work done by gravitational force in one revolution of earth around the sun on its elliptical path is zero because

Question

Work done by gravitational force in one revolution of earth around the sun on its elliptical path is zero because (A) force is always perpendicular to displacement (B) displacement is zero (C) displacement is non-zero (D) Both (a) and (c)

Tardigrade Admin · Accepted Answer

Gravitational force is conservative and hence it is independent of path, i.e. displacement is zero.
Due to this reason, work done by gravitational force in one revolution around the sun on its elliptical path is zero.

Q. Work done by gravitational force in one revolution of earth around the sun on its elliptical path is zero because

force is always perpendicular to displacement

displacement is zero

displacement is non-zero

Both (a) and (c)

Gravitational force is conservative and hence it is independent of path, i.e. displacement is zero. Due to this reason, work done by gravitational force in one revolution around the sun on its elliptical path is zero.

Gravitational force is conservative and hence it is independent of path, i.e. displacement is zero.
Due to this reason, work done by gravitational force in one revolution around the sun on its elliptical path is zero.