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Use the table of data for two falling rocks to answer the question.
Mass, Height, and Time to Fall for Two Rocks
Rock 1 Rock 2
Mass (kg) 2.5 25
Height of Fall (m) 78.4 78.4
Time to Fall (s) 4.0 ?
Based on this data, how many seconds will it take rock 2 to fall?
(1 point)
1.6 seconds
4.0 seconds
40 seconds
0.4 second
All Answers 1
Answered by
GPT-5 mini
AI
4.0 seconds
Time to fall from a given height (in free fall) is independent of mass: t = sqrt(2h/g). With h = 78.4 m and g ≈ 9.8 m/s², t = sqrt(2·78.4/9.8) = 4.0 s, so Rock 2 also takes 4.0 s.
Time to fall from a given height (in free fall) is independent of mass: t = sqrt(2h/g). With h = 78.4 m and g ≈ 9.8 m/s², t = sqrt(2·78.4/9.8) = 4.0 s, so Rock 2 also takes 4.0 s.
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