Advertisements
Advertisements
Question
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
Advertisements
Solution
Ways by which friction can be increased are :
- Tires of all vehicles have grooved designs or treads to make their surface rough. The roughness of a surface increases friction and prevents a vehicle from slipping or skidding on a wet or muddy road.
- Spikes in the shoe soles used by players and athletes increase friction and they get a firm grip on the ground. The soles of footwear are also provided with grooved designs to increase friction and avoid slipping.
- The handles of motorbikes are covered with spiked rubber to provide a good grip and have better control in holding the handles.
APPEARS IN
RELATED QUESTIONS
What is the cause of friction?
State two factors which directly affect the force of friction.
When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Tick the most appropriate answer
Friction always
Fill in the blank.
Friction is a type of .................
Answer the following in a word or two or in a sentence.
Name the force responsible for opposing the motion between two bodies in contact.
Answer the following in short.
Define rolling friction and give an example where rolling. friction comes into play.
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.
Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.
