Standard Science Primary 6 Interactions

Two identical sheets of paper, A and B, were dropped from the same height. Paper A was crumpled into a ball, while Paper B was left flat. Why did Paper A reach the ground first?

A Paper A has more mass than Paper B.
B Paper A has a smaller surface area, so it experienced less air resistance.
C Gravitational force acts more strongly on Paper A.
D Paper B has more mass than Paper A.
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Worked Solution

Step 1: Identify the changed variable (surface area). Step 2: Paper B (flat) has a larger surface area exposed to the air. Step 3: Larger surface area results in more air resistance (friction with air). Step 4: Paper A experiences less air resistance and falls faster.

Correct answer: Paper A has a smaller surface area, so it experienced less air resistance.

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