Lably

Skip to content

LablyBeyond the textbook

Home Labs Tours Practice Clubs Progress Rewards

HomeLabsToursPracticeClubsProgressRewardsMore

Labs
Science
Class 9

CBSE · Class 9 · Science

Work, Energy and Simple Machines

Chapter 7Motion, Force, Work and SoundCBSE / NCERT · Secondary & Senior Secondary

6 worlds · 4 labs for this chapter.

Topics

Energy
- Work and work-energy theorem
- Kinetic and potential energy
- Conservation of energy
- Power
Machines
- Mechanical advantage
- Levers
- Pulleys and inclined planes

Learning objectives

Account for an energy change and calculate a simple machine’s mechanical advantage.

Worlds

Places to explore freely · 6 worlds

WorldConservation of EnergyLet a coaster go from the top of its lift: height turns into speed, friction takes its cut, the loop asks for √(gr)
WorldPulleys, Ramps & WorkRig a block and tackle, haul a trolley up a ramp, time a winch: a machine trades force for distance, never saves work
WorldSimple MachinesLever, pulley, ramp and gears — pull the handle and a balance, two tapes and a work meter show exactly what each machine charges
WorldLevers, Moments & GearsBalance a playground seesaw, hang a crane's counterweight and climb a hill in the right bicycle gear
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
WorldWind & Solar EnergyDouble the wind on a real 2 MW turbine and get eight times the power, then tilt and track solar panels at 23°N

Main labs

Built for this chapter · 2 labs

Main labSimple Machines in ActionLever, pulley, inclined plane
Main labWork and EnergyPhysics

More labs

Also fit this chapter · 2 labs

LabOscillations LabSimple harmonic motion
LabWork, Energy and PowerPhysics

Practice

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

Open the question bank

Previous chapterForce and Laws of Motion Next chapterStructure of an Atom