subject

Friction

Physics ⇒ Mechanics

Friction starts at 8 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Friction. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 8
A car skids on a wet road. Explain why this happens in terms of friction.
Describe one situation where friction is undesirable.
Explain why ball bearings are used in machines.
Explain why brakes in vehicles use friction to stop the vehicle.
A 10 kg box is pushed with a force of 40 N and moves at constant speed. What is the frictional force acting on the box? (Take g = 10 m/s²)
A 5 kg object is pulled with a force of 25 N and moves at a constant velocity. What is the frictional force acting on the object?
A ball is rolling on a level ground and eventually comes to a stop. Which force is responsible for stopping the ball?
A block is sliding down an inclined plane. Name the two forces acting on the block.
The force of friction between two surfaces depends on (1) The nature of the surfaces (2) The area of contact (3) The mass of the object (4) Both 1 and 3
Which of the following is an example of fluid friction? (1) A car moving on a road (2) A fish swimming in water (3) A book sliding on a table (4) A ball rolling on grass
Which of the following is NOT a way to increase friction? (1) Making surfaces rougher (2) Adding oil (3) Increasing the weight (4) Using rubber pads
Which of the following is NOT an effect of friction? (1) Produces heat (2) Causes wear and tear (3) Helps in walking (4) Increases speed without limit
Fill in the blank: Friction converts kinetic energy into ________ energy.
Fill in the blank: The frictional force that acts when an object moves through air or water is called ________ friction.
Fill in the blank: The frictional force that acts when an object rolls over a surface is called ________ friction.
Fill in the blank: The frictional force that acts when one object slides over another is called ________ friction.
True or False: Friction can be both useful and harmful.
True or False: Friction can be completely eliminated.
True or False: Friction can be increased by making surfaces smoother.
True or False: Friction can produce heat.