Standard Science Primary 6 Interactions

Siti released a toy car from the top of the ramp as shown. She repeated the experiment by changing only the surface material of the ramp. What was the purpose of her experiment?

A To find out how gravitational force affects the speed.
B To find out how the type of surface affects the frictional force.
C To find out how the mass of the car affects the speed.
D To find out how the angle of the ramp affects the distance.
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Worked Solution

Step 1: Identify the changed variable (ramp surface material). Step [2-9]: Different materials create different amounts of friction. Step [2-9]: The experiment aims to measure the effect of that specific variable (surface) on friction/distance.

Correct answer: To find out how the type of surface affects the frictional force.

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