Standard Science Primary 6 Interactions

Siti conducted an experiment by releasing a toy car down a ramp. She tested four different materials on the surface of the ramp. The car travelled the furthest on Surface X.<br><br>Which of the following is the most likely reason why the car travelled the furthest on Surface X?

A Surface X is the hardest surface.
B Surface X has the least amount of friction.
C Surface X has the most amount of gravitational force.
D Surface X is the roughest surface.
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Worked Solution

Step 1: Distance travelled is determined by the opposing force (friction). Step 2: Furthest distance implies the car was slowed down the least. Step 3: Therefore, Surface X has the least friction.

Correct answer: Surface X has the least amount of friction.

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