Question

A 12 pound shot put and a small metal BB are dropped from a tall tower, inside a vacuum chamber,
and into a deep pool. Compare how the objects fall in these three scenarios.

Answer 1

Given what we know, we should observe the objects falling at the same speed in both the tower and vacuum scenarios, but not in the water.

What affects the speeds at which these objects fall?

• The falling speeds in both air and a vacuum will be the same for both objects.
• This is because falling speed is determined by gravity and is independent of the mass of the objects falling.
• The same will occur in water if and only if the densities of the two objects are equal.

Therefore, given that we can safely assume that the densities of the two objects are different from one another, we can confirm that while the objects will fall at the same speed in air and in a vacuum, this will not be the case in the deep pool.

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