MCQ Science and Technology Class 9 Chapter 1 Maharashtra Board Laws of Motion 1. What is the motion of the tip of a clock’s second hand called?Uniform circular motionNon-uniform motionUniform linear motionAccelerated linear motionQuestion 1 of 202. In uniform circular motion, what remains constant?VelocityDirectionSpeedAccelerationQuestion 2 of 203. What is the formula for speed in uniform circular motion given in the document?v = πr² / tv = 2πr / tv = r / tv = t / 2πrQuestion 3 of 204. What is the first equation of motion listed in the document?s = ut + ½ at²v² = u² + 2asv = u + ats = (u + v)t / 2Question 4 of 205. Which is the second equation of motion in the document?v = u + atv² = u² + 2ass = ut + ½ at²s = vtQuestion 5 of 206. What is the third equation of motion according to the document?s = ut + ½ at²v = u + ats = (u + v)tv² = u² + 2asQuestion 6 of 207. What causes the velocity to change in uniform circular motion?Change in speedChange in directionChange in massChange in timeQuestion 7 of 208. What is Newton’s first law of motion also known as?Law of action-reactionLaw of inertiaLaw of momentumLaw of accelerationQuestion 8 of 209. What does Newton’s first law of motion state?Force equals mass times accelerationEvery action has an equal and opposite reactionAn object remains at rest or in uniform motion unless acted upon by an unbalanced forceMomentum is conserved in collisionsQuestion 9 of 2010. Why do fruits fall when a tree’s branches are shaken?Due to gravity aloneDue to inertiaDue to balanced forcesDue to frictionQuestion 10 of 2011. What happens when balanced forces act on an object, as per the document?The object acceleratesThe object remains static or in uniform motionThe object deceleratesThe object changes directionQuestion 11 of 2012. What is momentum defined as in the document?Mass × AccelerationForce × TimeMass × VelocityVelocity / TimeQuestion 12 of 2013. What is the SI unit of momentum according to the document?Nkg m/sdyneg cm/sQuestion 13 of 2014. What does Newton’s second law of motion describe?Inertia of objectsEqual and opposite action-reaction forcesRate of change of momentum proportional to applied forceConservation of momentumQuestion 14 of 2015. What is the formula for force derived from Newton’s second law?F = m × vF = m × aF = v / tF = m / aQuestion 15 of 2016. What is the SI unit of force defined in the document?Dynekg m/sNewtong cm/sQuestion 16 of 2017. How is one newton defined in the document?Force causing 1 cm/s² acceleration in 1 g massForce causing 1 m/s² acceleration in 1 kg massForce causing 1 m/s acceleration in 1 kg massForce causing 1 m/s² acceleration in 1 g massQuestion 17 of 2018. What does Newton’s third law of motion state?An object remains at rest unless acted uponRate of change of momentum is proportional to forceEvery action has an equal and opposite reactionMomentum is conserved in collisionsQuestion 18 of 2019. Why does a gun recoil when a bullet is fired?Due to Newton’s first lawDue to Newton’s third lawDue to Newton’s second lawDue to conservation of energyQuestion 19 of 2020. On what do action and reaction forces act, per Newton’s third law?Same objectDifferent objectsSame directionDifferent magnitudesQuestion 20 of 20 Loading...
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