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A Ball Is Dropped from a Building onto a Scale

Question 62

Multiple Choice

A ball is dropped from a building onto a scale below. The ball has a mass of 2.1 kg and the scale reads 20.5 N at the moment of impact. What is the gravitational acceleration constant, the rate of acceleration for an object in free fall, for planet Earth?


A) 9.7 m/s2
B) 10.0 m/s2
C) 9.9 m/s2
D) 9.8 m/s2

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