Question

exam lesson name: motion and forces
exam number: 700696rr
exam guidelines
exam instructions
question 4 of 20 :
select the best answer for the question.

1. what do orbiting satellites and the orbit of the moon around the earth have in common?

a. parallel-force motion
b. central-force motion
c. friction
d. velocity
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Explanation:

Orbiting satellites and the Moon's orbit around Earth are both under the influence of a central force (gravitational force from the Earth for the Moon and satellite, acting towards the center of the Earth). Central - force motion is motion where the force is directed towards a fixed center. Parallel - force motion is not relevant here as the forces are radial (towards the center). Friction is negligible in space for these orbits, and velocity is a vector quantity that changes direction in orbit, so it's not the common factor. So the correct answer is B.

Answer:

B. Central - force motion