give 5 exmaples where we increase friction
Answers
Answer:
1. Walking –It is impossible to walk on the ground without friction.
2. Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper.
3. Skating – A thin film of water under the blade is necessary to make the skate slide.
4. Lighting a matchstick – When the head of the matchstick is rubbed against a rough surface, heat is generated and this heat converts red phosphorous to white phosphorous. White phosphorous is highly inflammable and the match stick ignites. Sometimes, matchsticks fail to ignite due to the presence of water. Water lowers friction.
5. Driving of the vehicle on a surface- While driving a vehicle, the engine generates a force on the driving wheels. This force initiates the vehicle to move forwards. Friction is the force that opposes the tire rubber from sliding on the road surface. This friction avoids skidding of vehicles.
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