Standard Science Primary 6 Interactions

Ravi rubs his hands together quickly on a cold morning. Why do his hands feel warmer?

A Kinetic energy is converted into chemical potential energy.
B The rubbing movement absorbs heat from his body.
C Heat is transferred from the surrounding air.
D Frictional force converts kinetic energy into heat energy.
Show Worked Solution

Worked Solution

Step 1: Rubbing involves movement (kinetic energy). Step 2: Frictional force exists between the surfaces of the hands. Step 3: This friction converts kinetic energy into heat energy, causing the temperature to rise.

Correct answer: Frictional force converts kinetic energy into heat energy.

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

Start Free Trial — 7 Days Free