
Concept explainers
Juan's teacher gives him three objects of equal volume and shape, but of different material,
and asks him to drop them from his shoulder height and watch the fall time to the ground,
from each of them. Juan observes that the three take different times to reach the ground,
Even though all three are subjected to the same gravitational acceleration. Taking into account
the above information, which of the following questions can be answered from the
observations made by Juan?
A. Does the falling time of objects depend on the launch height?
B. Is the gravitational force proportional to the mass of the objects?
C. Is the net force acting on each of the objects different?
D. Is the shape of objects related to differences in friction force?

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