Standard Science Primary 6 Interactions

Ravi wants to test how the mass of a wooden block affects the frictional force between the block and the table. Which variable should he change?

A The amount of weights added to the block
B The surface area of the block in contact
C The type of lubricant used
D The material of the table
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Worked Solution

Step 1: Identify the independent variable in the aim (mass). Step [2-9]: To change the mass, Ravi must add or remove weights from the block. Step [2-9]: All other variables must be kept constant for a fair test.

Correct answer: The amount of weights added to the block

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