Standard Science Primary 6 Interactions

A block was pushed across a table surface. Which of the following changes would INCREASE the frictional force between the block and the table?

A Increasing the surface area of the block in contact
B Applying oil to the table surface
C Placing an extra weight on top of the block
D Using a smoother material for the block
Show Worked Solution

Worked Solution

Step 1: Frictional force depends on the roughness of surfaces and the weight pressing them together. Step [2-9]: Adding weight increases the pressing force between the two surfaces. Step [2-9]: This increases the resistance to motion, thereby increasing friction.

Correct answer: Placing an extra weight on top of the block

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free