ANSWER THE FOLLOWING QUESTIONS:
Q1. Explain the importance of friction. Q2. Give reasons:
a. The handles of the motor cycles are covered with a towel materialor a rubber sheet with spikes.
b. The bathroom slippers with rubbed off shoes are recommended to be replaced immediately.
c. The shape of the aircrafts is streamlined.
d. The moving parts of the machines are oiled from time to time.
Answers
1. lmportance of frictions force: This force acts between the two surface which are in contact with each other.
2.when we use for long time thst are rubbed due to continuous contact with floor and hence the surface of slippers became slippery.
3.Fast moving vehicles are given streamlined shape cut through the air very easily and thus increased there speed
4.Because they are mechanical devices and they have metal and they have metal moving part.
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Answer:
friction : Resistance to motion of one object moving relative to another.
it is not a fundamental force.
importance of friction:
because of friction we are able to write,able to walk on roads,drive vehicles, machines working can I say one thing we are able to hold a pencil or pen in hand due to friction...!!!!!
Explanation:
2)a]because towel materialor a rubber sheet with spikes provide grip to handle the bikehandles and palms rough
surrface so more friction
b] bathroom slippers with rubbed off shoes are recommended because rubbed of shoes provides more grip, had more friction then sol of slippers
prevent u from slipping
c] shape of the aircraft is streamlined because to prevent air flow . Generally this is seen in aircrafts.
d]the moving part of the machines are oiled from time to time because it reduces friction and provide lubrication between parts .lets take an example
we grease the chain of the cycle for the free moment of bicycle