Advertisements
Advertisements
प्रश्न
Explain how friction can be minimized.
Advertisements
उत्तर
- Using lubricants:
- A substance, which reduces the frictional force, is called a lubricant. Example: Grease, coconut oil, graphite, castor oil, etc.
- The lubricants fill up the gaps in the irregular surfaces between the bodies in contact. This provides a smooth layer thus preventing direct contact between their rough surfaces.
- Using ball bearing:
Since the rolling friction is smaller than sliding friction, sliding is replaced by rolling with the usage of ball bearings. We can see lead shots in the bearing of a cycle hub.
APPEARS IN
संबंधित प्रश्न
Friction depends on the ______ of surfaces.
Write true or false.
The sliding friction is more than the rolling friction.
Name the two kinds of forces in nature.
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
Friction for an object can be reduced by
State if the following statement is true or false. Correct the statement if it is false.
Friction is offered by all the three states of matter.
Rolling friction is slightly greater than sliding friction.
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Friction depends on the ______ of two surfaces in contact.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
