Foundation Science Primary 6 Interactions

Ravi dropped a feather and a rock from the same height in a vacuum (where there is no air). Which of the following statements is true?

A The rock will reach the ground first because it is heavier.
B Neither will fall because there is no air.
C The feather will reach the ground first because it is lighter.
D Both will reach the ground at the same time because gravity acts on both equally.
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Worked Solution

Step 1: Identify the environment (vacuum = no air resistance). Step [2-9]: Gravity pulls all objects toward Earth at the same rate regardless of mass. Step [2-9]: Without air resistance to slow the feather down, both hit the ground simultaneously.

Correct answer: Both will reach the ground at the same time because gravity acts on both equally.

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