Q5a) Define streamlined shape?why shape of aeroplane is streamline? 05) friction is a necessary evil explain it? Q6a) Why often oiling and greasing done in moving parts of machine?
Answers
Answer:
Q5a) The aeroplanes and ships have streamlined shaped bodies to reduce drag. The streamlined shaped body experiences minimum resistance when travelling through water or air. It helps to reduce friction.
05) Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. ... Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil .
Q6a) the moving parts of our equipment need grease for smooth movement and to eliminate wear from heat and friction.
Explanation:
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Answer:
A streamlined body is a shape that lowers the friction drag between a fluid, like air and water, and an object moving through that fluid. It offers a minimum resistance to air and water by its particular type of body shape .
Explanation:
The aero planes and ships have streamlined shaped bodies to reduce drag. The streamlined shaped body experiences minimum resistance when travelling through water or air. It helps to reduce friction.
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