Standard Science Primary 6 Interactions

An astronaut dropped a feather and a hammer at the same time on the Moon, where there is no air. Both objects hit the ground at the same time. Why?

A There is no gravitational force on the Moon.
B Both objects have the same mass on the Moon.
C The hammer is lighter on the Moon than on Earth.
D Gravitational force pulls both objects down without air resistance.
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Worked Solution

Step 1: Recognize that gravity acts on all objects regardless of mass. Step [2-9]: On the Moon, there is no air, so there is no air resistance (friction) to slow the feather down. Step [2-9]: Therefore, they accelerate at the same rate under gravity alone.

Correct answer: Gravitational force pulls both objects down without air resistance.

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