Question

The orbit of Pluto is much more eccentric than the orbits of the other planets. That is, instead of being nearly circular, the orbit is noticeably elliptical. The point in the orbit nearest to the Sun is called the perihelion and the point farthest from the Sun is called the aphelion. At perihelion, the gravitational potential energy of Pluto in its orbit has :

• A. Its maximum value
• B. Its minimum value
• C. The same value as at every other point in the orbit
• D. The value which depends on the sense of rotation

Answer 1

The correct option is B Its minimum value

Gravitational potential energy = $\frac{-GMm}{r}$

If $r$ reduces, it will become more negative , hence decreases.