4. Why do we lubricate machine parts? What would happen if we do not do so? 5. What is streamlining? How does it reduce friction due to air resistance? Out of the hori
Answers
Answer:
1) All of the machines contain parts which, during operation, rub against each other. In order to reduce this friction and consequently prolong the operational lifespan of the machine's parts, it is vital to lubricate them on a regular basis.
2) When objects move, the air around them generates a type of friction called air resistance, or drag, that slows them down. Fast-moving objects such as cars, trains, and aeroplanes are all streamlined ? designed with curved and sloping surfaces to cut through the air and reduce drag.
Explanation:
please do like it
Answer:
1. To Lubricate machine parts is very IMP.
2. Streaming is a process in which we contouring of an object, such as aircraft bodies to reduce its drag.
Explanation:
1. Because to stop rusting nd for better working of machinery.
And if we don't lubricate machineries then they don't working properly... nd we facing problem..
2. To shape something so that it can move quickly nd effectively...so 4 an example of Airplane- it's two wings help to fly because these wing cut the air resistence...
I hope this ans. May help u☺️