Standard Science Primary 6 Interactions

Siti wants to reduce the friction between a heavy wooden crate and the concrete floor to make it easier to move. Which of the following methods would be most effective?

A Placing rollers underneath the crate
B Increasing the mass of the crate
C Applying a layer of sand on the floor
D Using a thicker rope to pull the crate
Show Worked Solution

Worked Solution

Step 1: Friction opposes motion between two surfaces in contact. Step [2-9]: Rollers convert sliding friction into rolling friction, which is much lower. Step [2-9]: Therefore, placing rollers reduces the force needed to move the crate.

Correct answer: Placing rollers underneath the crate

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

Start Free Trial — 7 Days Free