MCQ Chapter 3 General Science Class 8 Maharashtra Board MCQ For All Chapters – General Science Class 8Force and Pressure 1. What exerts pressure equally in all directions within a container?SolidsFluidsGases onlyLiquids onlyQuestion 1 of 202. What is the atmospheric pressure at sea level called?1 Pascal1 Atmosphere1 Barometer1 NewtonQuestion 2 of 203. Why don’t we feel atmospheric pressure on our heads?It is too weakOur body cavities balance itIt only acts upwardIt is absorbed by our skinQuestion 3 of 204. What is the upward force acting on an object in a fluid called?Gravitational forceFrictional forceBuoyant forceMuscular forceQuestion 4 of 205. Why does a bucket feel lighter when immersed in water?Gravity decreasesBuoyant force opposes its weightFriction increasesPressure decreasesQuestion 5 of 206. Why does a steel ship float while an iron nail sinks?The ship has less densityThe ship displaces more waterThe nail has more buoyant forceThe ship has no weightQuestion 6 of 207. What does buoyant force depend on?Mass and areaVolume and density of liquidPressure and frictionWeight and heightQuestion 7 of 208. According to Archimedes’ Principle, what is the buoyant force equal to?Weight of the objectVolume of the fluidWeight of the fluid displacedDensity of the objectQuestion 8 of 209. What happens to an object if the buoyant force is larger than its weight?It sinksIt floatsIt remains stationaryIt moves downwardQuestion 9 of 2010. What is the SI unit of density?kg/m²N/m²kg/m³PascalQuestion 10 of 2011. What is relative density also called?Specific gravityBuoyant forceAtmospheric pressureFrictional forceQuestion 11 of 2012. If a screw exerts a pressure of 10⁶ Pa, what does this indicate?Large area of contactSmall area of contactHigh frictional forceLow gravitational forceQuestion 12 of 2013. Why does a block exert maximum pressure on surface BCFG?It has the largest areaIt has the smallest areaIt has the highest weightIt has the lowest densityQuestion 13 of 2014. What is the weight of a 100 g marble tile in water if its density is 2.5 g/cc?40 g60 g100 g80 gQuestion 14 of 2015. What is the SI unit of force?PascalNewtonJouleDyneQuestion 15 of 2016. The air pressure on our body is equal to what pressure?Sea bottomSpaceAtmosphericLiquidQuestion 16 of 2017. Why do heavy vehicles have a large number of wheels?To increase pressureTo reduce pressureTo increase frictionTo reduce buoyancyQuestion 17 of 2018. Why is the wall of a dam broader at its base?To reduce pressureTo withstand higher pressureTo increase buoyancyTo reduce frictionQuestion 18 of 2019. If an object has a volume of 20 cm³ and mass of 50 g, will it float or sink in water?FloatSinkRemain stationaryRise partiallyQuestion 19 of 2020. What will a sealed box of volume 350 cm³ and mass 500 g do in water?FloatSinkStay at the surfaceRise halfwayQuestion 20 of 20 Loading...
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