Standard Science Primary 6 Interactions

Siti applied some grease to the chain of her bicycle. How does this help her ride the bicycle more easily?

A It reduces the frictional force between moving parts.
B It increases the mass of the bicycle.
C It increases the gravitational pull on the bicycle.
D It converts kinetic energy into potential energy.
Show Worked Solution

Worked Solution

Step 1: Grease is a lubricant. Step [2-9]: Lubricants reduce friction between surfaces in contact. Step [2-9]: Lower friction means less force is needed to move the parts, making the ride easier.

Correct answer: It reduces the frictional force between moving parts.

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

Start Free Trial — 7 Days Free