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प्रश्न
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
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उत्तर
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.
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संबंधित प्रश्न
Give an example to illustrate the existence of the force of friction.
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Answer the following in detail.
What are the various effects of force? State one example of each.
Tick the most appropriate answer.
Friction is offered by
State if the following statement is true or false. Correct the statement if it is false.
Friction helps us to grip the objects in our hand.
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
Is there any possibility of making a special device to measure the magnitude of friction directly?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.
