Frictional Force
Important Questions on Frictional Force
Select the activities where friction is necessary.
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| Lighting a matchstick | Playing billiards | Writing on green board | Walking on a banana peel |
When applying brakes to a cycle, the force responsible for stopping the bicycle is acting _____.
When different parts of a machine move, they rub against each other, but this gradually leads to the damage of the machine and machine parts. How do the parts of the machines wear out?
When different parts of a machine move, they rub against each other, but this gradually leads to the damage of machine and machine parts. Which of the following forces is responsible for the damage?
In the rainy season, what do you do to avoid slipping on the wet road outside your house? Why?
Weightlifters and gymnasts rub a rough and course material on their hands. Why?
Write three ways to increase friction.
What is the difference between static, sliding and rolling frictions?
Give two examples that friction produces heat.
Give two examples of lubricants.
Static friction is less than sliding friction.
Friction does not act on a bird flying in the air.
Friction force depends on the types of surfaces in contact.
Friction always acts in the same direction as motion.
Friction opposes the _____ of a moving object.
Friction always opposes relative _____ between the surfaces in contact with each other.
Ball bearing is a device that usually converts
Which of the following does not have a streamlined shape?
Which of the following statements is incorrect?
