MCQ Energy Chapter 10 Class 9 Science Advertisement MCQ’s For All Chapters – Science Class 9th 1. The main natural source of energy for life on Earth isWindThe SunWaterFossil fuelsQuestion 1 of 202. The energy possessed by an object because of its ability to do work is calledPowerHeatEnergyForceQuestion 2 of 203. The unit of energy is the same as that ofForcePowerWorkVelocityQuestion 3 of 204. 1 kilojoule (kJ) is equal to10 J100 J1000 J10000 JQuestion 4 of 205. When a moving object does work, it must possessHeat energySound energyKinetic energyChemical energyQuestion 5 of 206. The energy possessed by an object due to its motion is calledMechanical energyKinetic energyPotential energyThermal energyQuestion 6 of 207. The kinetic energy of an object increases withDecrease in velocityIncrease in speedIncrease in mass onlyDecrease in massQuestion 7 of 208. The relation between work and change in kinetic energy isWork = mass × accelerationWork = change in kinetic energyWork = velocity × displacementWork = potential energyQuestion 8 of 209. The formula for kinetic energy of an object ismv²½ mv²mghF × sQuestion 9 of 2010. If the velocity of an object becomes double, its kinetic energy becomesDoubleHalfFour timesSameQuestion 10 of 2011. A moving object of mass 15 kg and velocity 4 m/s has kinetic energy equal to15 J30 J60 J120 JQuestion 11 of 2012. An object with energy can do work because it canLose energyApply force and cause displacementStop motion of other bodiesRemain at restQuestion 12 of 2013. When you stretch a rubber band, the energy stored in it isHeat energyPotential energyKinetic energyChemical energyQuestion 13 of 2014. The energy possessed by an object due to its position or configuration isKinetic energyPotential energyMechanical energyThermal energyQuestion 14 of 2015. A stretched bow possessesKinetic energy onlyPotential energy onlyBoth kinetic and potential energyNo energyQuestion 15 of 2016. When a wound-up spring of a toy car is released, the stored energy changes intoLight energyHeat energyKinetic energyChemical energyQuestion 16 of 2017. The potential energy of a lifted object is due toGravityFrictionAir resistanceElasticityQuestion 17 of 2018. The formula for gravitational potential energy isF × s½ mv²mghmg/sQuestion 18 of 2019. The gravitational potential energy of a body depends onIts mass and heightIts speedIts densityIts shape onlyQuestion 19 of 2020. When an object is raised through a height h, the work done on it equalsZeroIts potential energy mghIts kinetic energy ½mv²Its weight onlyQuestion 20 of 20 Loading...
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