In many machines friction is reduced by using
Web27 mei 2024 · Friction can be reduced by using (a) oil (b) grease (c) powder (d) all of these Answer Question 5. Static friction is less than (a) sliding friction (b) rolling friction (c) both (a) and (b) (d) none of these Answer Question 6. Whenever the surfaces in contact tend to … Web4 apr. 2024 · answered In many machines, friction is reduced by a) Ball bearing b) Lubricants c) both a and b d) none See answers Advertisement Advertisement …
In many machines friction is reduced by using
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WebMost of our useful energy is lost as heat and sound due to the friction between various moving parts of machines. In machines, friction also causes wear and tear of their moving parts. Methods of reducing friction. The friction can be reduced by: Making the sliding surfaces smooth. Making the fast-moving objects a streamlined shape (fish shape ... http://standrewsdelhi.com/images/assignments/class-8/Science-%20Friction%20Worksheet-10%20(VIII).pdf
Web17 sep. 2024 · In many machines , friction is reduced by using _____ ? a) Force b) Ball bearings Ans. b) Ball bearings 13.) Stricking a matchstick produces fire by ____ ? a) … WebFriction can be reduced by using lubricants. 18. When one body rolls over another body, rolling friction comes into play. Rolling friction is smaller than sliding friction. 19. In many machines, friction is reduced by using ball bearings. 20. Fluid friction can be minimised by giving suitable shapes to bodies moving in fluids.
WebFriction is frequently portrayed in the popular media as having a ‘bad’ effect and as something to be reduced or eliminated (for example by using friction reducing oils). However, in students’ everyday lives, friction is not itself seen as involving forces and nor is it seen as being present when things are not moving (for example, acting on a child who … WebMethods to reduce friction: Some methods to reduce friction are provided below: When objects are rolled over the surface, the friction between the rolled object and the surface …
Web2 dagen geleden · In many machines, friction is reduced by using _____. Ans: Ball bearing. 10. What ... This friction can be reduced with the use of lubricants like oil or grease. …
WebOnce in motion it is easier to keep it in motion than it was to get it started, indicating that the kinetic friction force is less than the static friction force. If you add mass to the crate, say by placing a box on top of it, you need to push even harder … excel workday function with holidaysWebWe can increase friction by using brake pads in the brake system of bicycles and automobiles. Gymnasts apply some coarse substances on their hands to increase friction for better grip. Reducing Friction. Friction can be … excel workday formula weekendWeb11 okt. 2024 · They are used to reduce friction. Question 13. Which surface does produce more friction—smooth or rough surface? Answer: Rough surface Question 14. Why is fine powder sprinkled on the carrom board? Answer: In order to reduce friction powder is sprinkled on carrom board. Question 15. Why is it difficult to walk on the wet marble floor? … excel workday intl functionWebi) Friction can be reduced by making the surface is smooth by polishing. ii) Friction can be reduced by applying lubricants or oil or grease to the rubbing surfaces. iii) Friction can be reduced by using wheels to move objects. iv) Friction can be reduced by using ball bearings between the moving parts of machines. excel work days in a monthWebFriction coefficient as low as 0.05 between dry sliding surfaces has been achieved when the mechanical interactions are eliminated. This result has been achieved based on a hypothetical model of an ideal surface for low friction. Model experiments were done using a hard smooth surface coated with a sub-micron thick elastomer layer. bsf in indiaWebWe can limit the amount of friction using lubrication . Substances like motor oil can be used to stop metal parts from rubbing and wearing away. Modern taps use moving parts made … excel workday not workingWebReduced tension rings have yielded friction reduction in the range of 5 to 10%, with fuel economy improvements of 1 to 2%. Elimination of one of the two compression rings has also been tried on some engines, and two-ring pistons may be the low friction concept for the future. Pistons have also been redesigned to decrease friction. excel workdays with holidays