MCQ Newton’s First Law of Motion Chapter 8 Class 9 Science Advertisement MCQ’s For All Chapters – Science Class 9th 1. Newton’s First Law of Motion is also known as:Law of AccelerationLaw of MomentumLaw of InertiaLaw of ForceQuestion 1 of 202. According to the First Law, an object remains in its state of rest or uniform motion unless:A balanced force acts on itNo force acts on itAn unbalanced force acts on itGravity acts on itQuestion 2 of 203. The tendency of undisturbed objects to stay at rest or in motion is called:VelocityInertiaFrictionAccelerationQuestion 3 of 204. Galileo concluded from his inclined plane experiment that objects move with constant speed when:A force acts continuouslyNo net force acts on themFriction increasesGravity pulls them stronglyQuestion 4 of 205. What happens to a marble on a smooth horizontal plane in Galileo’s experiment?It stops immediatelyIt continues to move foreverIt moves in a circleIt falls to the groundQuestion 5 of 206. Which factor prevents perfect demonstration of the First Law in real life?Air pressureFrictional forceMagnetic forceTemperatureQuestion 6 of 207. When a moving car suddenly stops, passengers tend to move forward due to:FrictionGravityInertia of motionAir resistanceQuestion 7 of 208. When a stationary bus suddenly starts, passengers fall backward because:Air pushes them backBus floor moves but body resists motionGravitational pull actsInertia of rest vanishesQuestion 8 of 209. What safety device prevents injury when a car suddenly stops?AirbagSeat beltHeadlightBrake pedalQuestion 9 of 2010. When a motorcar makes a sharp turn at high speed, passengers tend to:Fall to the center of the turnGet thrown to one sideMove fasterStop instantlyQuestion 10 of 2011. What is illustrated when leaves fall off a tree after shaking its branch?Force of gravityInertia of restAir frictionLaw of accelerationQuestion 11 of 2012. The First Law of Motion applies to:Only objects at restOnly moving objectsBoth at rest and moving objectsOnly rotating objectsQuestion 12 of 2013. when the bottom carom coin is struck sharply, the rest fall vertically because of: FrictionInertia of motionInertia of restGravity onlyQuestion 13 of 2014. when the card is flicked from under the coin, the coin falls vertically due to: Force of handInertia of restMagnetic attractionElasticityQuestion 14 of 2015. Which property determines how much inertia an object has?ShapeColorMassVolumeQuestion 15 of 2016. Which object has greater inertia?A rubber ballA stone of the same sizeBoth equallyNoneQuestion 16 of 2017. When a tray of water is rotated quickly, water spills out because of:Inertia of rest of waterCentripetal forceInertia of motionGravitational pullQuestion 17 of 2018. Which situation best demonstrates inertia of motion?A book on a tableA stone lying on groundA passenger moving forward when a bus stopsA ball staying at restQuestion 18 of 2019. Which situation best demonstrates inertia of rest?Coin falling into glass after card is flickedBall rolling on floorCar turning sharplyFielder catching a ballQuestion 19 of 2020. What does Newton’s First Law of Motion help to explain?Why objects move without forceWhy motion continues unless stopped by an external forceWhy speed increases automaticallyWhy all forces are equalQuestion 20 of 20 Loading...
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