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Science
Class 9

CBSE · Class 9 · Science

Force and Laws of Motion

Chapter 6Motion, Force, Work and SoundCBSE / NCERT · Secondary & Senior Secondary

7 worlds · 2 labs for this chapter.

Topics

Forces
- Balanced and unbalanced forces
- Friction
- Newton’s three laws
- Force, mass and acceleration

Learning objectives

Use Newton’s laws to explain an everyday interaction and calculate a resultant force.

Worlds

Places to explore freely · 7 worlds

WorldMomentum & CollisionsSwing a wrecking ball through a brick wall, crash a sled with and without a crumple zone, and couple railway wagons
WorldRocket PropulsionStatic-fire a rocket engine on a load cell, then fly a 12-tonne sounding rocket through the thinning air into space
WorldFree Fall & Air ResistanceRace a hammer and a feather through a vacuum, then ride a 45 m drop tower until the air stops you speeding up
WorldMotion & ForcesEight experiments on one track, Class 6–9 or Class 10–12 — light gates, ticker tape, friction, a ramp, a crash — each stop measured by the cart itself
WorldGravity Across WorldsEight worlds on one physics engine — then drag gravity down and watch every machine answer at once
WorldNewton’s Laws of MotionBrake a 1,720 t freight train from 100 km/h and watch it need nearly a kilometre: Newton’s laws in a rail yard
WorldFrictionWax a playground slide, mat it, rain on it, then tilt a test chute until a rubber boot finally lets go

Main lab

Built for this chapter · 1 lab

Main labForce and Laws of MotionForce, mass, acceleration

More labs

Also fit this chapter · 1 lab

LabFriction LabPhysics

Practice

Questions for Class 9 Science, with worked answers, on screen or as a printed paper.

Open the question bank

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