Planets Go Around the Sun in Elliptical Orbits $\mathrm { F } _ { \perp }$

Multiple Choice

Planets go around the sun in elliptical orbits.The highly exaggerated diagram below shows a portion of such an orbit and the force on the planet at one position along that orbit.The planet is moving to the right.F_|| and $\mathrm { F } _ { \perp }$ are the components of the force parallel (tangential) and perpendicular (normal) to the orbit.The work they do is W_|| and $W _ { \perp }$ .At the position shown

A) W_|| slows the planet down; $W _ { \perp }$ speeds it up.
B) W_|| slows the planet down; $W _ { \perp }$ does no work on it.
C) W_|| speeds the planet up; $W _ { \perp }$ does no work on it.
D) W_|| speeds the planet up; $W _ { \perp }$ slows it down.
E) W_|| does no work on it; $W _ { \perp }$ speeds the planet up.