Advertisements
Advertisements
प्रश्न
Answer the following in detail.
Describe three different ways by which friction can be increased to help us in various situations?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
Like charges always attract each other.
Fill in the blank.
The force of friction acting between two bodies in contact while at rest is known as ................ friction.
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction for an object can be reduced by
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
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.
Match the following.
| Column I | Column II | |
| a) | Static friction | viscosity |
| b) | Kinetic friction | least friction |
| c) | Rolling friction | objects are in motion |
| d) | Friction between the liquid layers | objects are sliding |
| e) | Sliding friction | objects are at rest |
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
