Question

challenge 1 - unlock the laws of motion
complete this challenge to activate the module’s autonav system.
solve 3 riddles connecting planetary motion to newton’s 3 laws
1 in the solar realm where forces twirl,
gravity’s pull makes planets swirl.
2 acceleration’s secret, not surpassed,
relates to this force and each planet’s...
3 four empty boxes
students, write your response!
pear deck interactive slide
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Explanation:

The riddle connects to Newton's second law ($F = ma$), where force (gravity) relates to acceleration and mass. The missing word is "mass" as the second law shows acceleration is force divided by mass, so the force (gravity) and a planet's mass determine acceleration in planetary motion.

Answer:

mass