The allowed shapes for the orbits of objects responding only to the force of gravity are
A. ellipses, parabolas, and hyperbolas.
B. ellipses only.
C. ellipses, spirals, and parabolas.
D. circles and ellipses.
Answer:A
The allowed shapes for the orbits of objects responding only to the force of gravity are
A. ellipses, parabolas, and hyperbolas. B. ellipses only. C. ellipses, spirals, and parabolas. D. circles and ellipses.