Question

in the diagram, planets a, b, and c have the same mass. which of these statements is true about the motion of these planets? a. planet a will take the longest time to complete an orbit, while planet c will take the shortest time. b. planet a will take the shortest time to complete an orbit, while planet c will take the longest time. c. the combined gravity of planets a and c will cause planet b to take the longest time to orbit. d. all the planets will take the same amount of time to complete one orbit.

Explanation:

According to Kepler's laws of planetary motion, the farther a planet is from the sun, the longer it takes to complete an orbit. Planet C is the farthest from the sun among A, B, and C, so it will take the longest time to complete an orbit, while planet A is the closest and will take the shortest time.

Answer:

A. Planet A will take the shortest time to complete an orbit, while planet C will take the longest time.