Foundation Science Primary 6 Interactions

Siti drops 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 feather will reach the ground first.
B Both will reach the ground at the same time.
C The rock will reach the ground first.
D Neither will reach the ground.
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Worked Solution

Step 1: Gravity acts on all objects with mass. Step [2-9]: Air resistance is the force that usually slows down light objects like feathers. Step [2-9]: Without air (vacuum), only gravity acts, causing all objects to fall at the same rate.

Correct answer: Both will reach the ground at the same time.

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