Physics · Class 11 · Chapter 4
Laws of Motion
11 lessons122 min10 simulations9 practice questions
This chapter moves from describing motion to explaining it. It builds Newton's three laws from the idea of inertia, introduces momentum and impulse, shows how momentum conservation follows, and then applies the laws to the forces met most often in mechanics: weight, normal reaction, tension, spring force, friction and the centripetal force needed for circular motion.
Also called: Newton's laws of motion · friction · free body diagrams
Lessons
11 lessons · 122 min
01Aristotle's fallacy and the law of inertiaNCERT § "Aristotle's Fallacy" and § "The Law of Inertia"7 min02Newton's first law of motionNCERT § "Newton's First Law of Motion"8 min03Newton's second law, momentum and impulseNCERT § "Newton's Second Law of Motion"11 min1 sim04Newton's third law of motionNCERT § "Newton's Third Law of Motion"7 min05Conservation of momentumNCERT § "Conservation of Momentum"10 min1 sim06Equilibrium of a particleNCERT § "Equilibrium of a Particle"10 min1 sim07Common forces in mechanicsNCERT § "Common Forces in Mechanics"10 min1 sim08FrictionNCERT § "Friction"14 min2 sims09Circular motionNCERT § "Circular Motion"14 min2 sims10Solving problems in mechanicsNCERT § "Solving Problems in Mechanics"15 min2 sims11Chapter reviewMust-know facts, traps and formulas16 min
Simulations
10 in this chapter
Same change in momentum, different forceIn: Newton's second law, momentum and impulseExplosion: equal momenta, unequal energiesIn: Conservation of momentumA weight on two stringsIn: Equilibrium of a particleHeavier or lighter in a lift?In: Common forces in mechanicsStatic friction adjusts itself, up to a limitIn: FrictionWhat pushes the crate forward?In: FrictionWhat keeps a car on a banked curveIn: Circular motionWho supplies the centripetal force?In: Circular motionFriction is not always μNIn: Solving problems in mechanicsConnected bodies: one a, two free-body diagramsIn: Solving problems in mechanics