In the lab we considered using a plastic cylinder and a brass cylinder similar i

Question

In the lab we considered using a plastic cylinder and a brass cylinder similar in size and shape. If you drop them at the same time and from a height of 20 m (higher than what you have used in the lab), will they hit the ground at the same time? Do not neglect any forces in answering this question.

a. It is not possible to predict this with the given information.

b. No, the brass cylinder will hit the ground first.

c. Yes, but in theory they should not.

d. No, the plastic cylinder will hit the ground first.

e. Yes.

Explanation / Answer

Air friction on both the cylinders will be same but using equation

mg - f = ma, a = g - f/m, acceleration will be more in the cylinder having more mass, means in brass cylinder, acceleration will be more hence it will hit the ground first.

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