MCQ Class 8 Science Chapter 9 Friction Advertisement MCQ’s For All Chapters – Science Class 8th 1. Friction is anon-contact forcecontact forcemagnetic forceelectrostatic forceYour comments:Question 1 of 202. Which of the following produces least friction?Sliding frictionRolling frictionComposite frictionStatic frictionYour comments:Question 2 of 203. Friction alwaysopposes the motionhelps the motionboth (a) and (b)none of theseYour comments:Question 3 of 204. Friction can be reduced by usingoilgreasepowderall of theseYour comments:Question 4 of 205. Static friction is less thansliding frictionrolling frictionboth (a) and (b)none of theseYour comments:Question 5 of 206. Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into playonly if the objects are solidonly if one of the two objects is liquidonly if one of the two objects is gaseousirrespective of whether the objects are solid, liquid or gaseousYour comments:Question 6 of 207. To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?StonePlastic blockWooden blockGlass blockYour comments:Question 7 of 208. The shape of an aeroplane is like adog birdcarall of theseYour comments:Question 8 of 209. Friction isfoefriendboth (a) and (b)none of theseYour comments:Question 9 of 2010. Friction due to fluids is calledforcepressurefrictiondragYour comments:Question 10 of 2011. Which of the following is not a smooth surface?Surface of wet soapSurface of tyresGlazed tilesSurface of mirrorYour comments:Question 11 of 2012. A toy car released with the same initial speed will travel farthest onmuddy surfacepolished marble surfacecemented surfacebrick surfaceYour comments:Question 12 of 2013. If we apply oil on door hinges, the friction willincreasedecreasedisappear altogetherwill remain unchangedYour comments:Question 13 of 2014. Lubricantreduce friction increase frictionboth (a) and (b)none of theseYour comments:Question 14 of 2015. Force of friction depends onroughness of surfacesmoothness of surfaceinclination of surfaceall of theseYour comments:Question 15 of 2016. Force of friction depends onroughness of surfaceweightsizeall of theseYour comments:Question 16 of 2017. Fluids areliquidsgasesboth (a) and (b)none of theseYour comments:Question 17 of 2018. Which is a streamlined object?BoatsAeroplanesShipsAll of theseYour comments:Question 18 of 2019. Smooth surface hasless friction more frictionsometimes less and sometimes moreall of theseYour comments:Question 19 of 2020. Which of the following is responsible for wearing out of bicycle tyres?Muscular forceMagnetic forceFrictional forceElectrostatic forceYour comments:Question 20 of 20 Loading...
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