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.
Question 2
In the heliocentric (Sun-centered) model, apparent retrograde motion is due to
A) relative motion between the Earth and another planet in its orbit
B) the Earth reversing the direction of its orbit about the Sun
C) a planet moving in a small circle, the center of which moves in a larger circle about the Earth
D) a planet reversing the direction of its orbit about the Sun
Gravity Works at All Scales
Different Classifications of Solar System Objects
Muscle length versus isometric force
Severe arthritis can make everyday activities, like writing, typing, and handling objects
finding resultant for the following force combinations
Question about Resultant of gravitational force?