Standard Science Primary 6 Interactions

Ravi pushed a wooden block across a floor. He noticed that it was harder to push when he placed a 5kg weight on top of the block. This is because __________.

A the frictional force between the block and the floor increased
B the mass of the block decreased
C the floor became smoother
D the gravitational force acting on the block decreased
Show Worked Solution

Worked Solution

Step 1: Adding a weight increases the total mass and weight of the block. Step [2-9]: This causes the block to press harder against the floor. Step [2-9]: Greater pressing force increases the frictional force between the surfaces.

Correct answer: the frictional force between the block and the floor increased

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