Friction Quiz - CBSE Class 4 Science

Free practice quiz: Friction (CBSE Class 4 Science). 17 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which surface would create the most friction?

   1. Ice
   2. Sandpaper
   3. Wet floor
   4. Smooth glass
   Show answer

   Answer: B. Sandpaper

   Sandpaper has a rough surface which creates a lot of friction compared to smoother surfaces like ice or glass.

2. Which situation would result in less friction?

   1. Pushing a heavy box on a carpet
   2. Sliding a small toy on a wood table
   3. Rolling a ball on grass
   4. Dragging a bag through sand
   Show answer

   Answer: B. Sliding a small toy on a wood table

   Wood on wood generally offers less friction compared to other rough surfaces like carpet or grass.

3. If you want to reduce friction between two surfaces, you can:

   1. Make them rougher
   2. Add oil
   3. Increase weight
   4. Increase speed
   Show answer

   Answer: B. Add oil

   Adding oil creates a lubricant layer between the surfaces, reducing friction and allowing smoother movement.

4. Which factor does NOT affect friction?

   1. Surface texture
   2. Weight of the object
   3. Speed of the object
   4. Type of material of the object
   Show answer

   Answer: C. Speed of the object

   While surface texture, weight, and type of material affect friction, the speed of the object does not inherently change the friction force.

5. Why can friction cause wear and tear?

   1. It is a pulling force
   2. It generates heat
   3. It is always negative
   4. It is invisible
   Show answer

   Answer: B. It generates heat

   Friction generates heat when objects rub together, leading to wear and tear over time.

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