Physics has an image problem in Pakistani schools: students experience it as formulas on a board — v = u + at, F = ma, V = IR — memorised for the exam and forgotten after it. But physics is the science of the everyday world, and the everyday world is full of laboratory equipment: a staircase is a motion lab, a steel spoon is a mirror, a torch battery is a power supply. Physics experiments with everyday materials reconnect the formulas to reality, and they cost almost nothing — which means every student experiments, not just the front bench.
This guide gives fifteen experiments for Classes 9–10, organised into motion, light, and electricity, each with materials, method, the concept it teaches, and its board-exam link. Everything uses household items, bazaar parts, or the school's existing basic apparatus. No expensive lab required.
Why Everyday Materials Teach Physics Better
Standard physics apparatus — trolleys, ticker timers, optical benches — is precise, expensive, and scarce: most schools have one set for forty students, so thirty-nine watch. Everyday materials invert that: every pair of students gets a ramp, a mirror, a circuit, and does the experiment themselves. Doing beats watching by an enormous margin in physics, because physics understanding lives in the hands — feeling friction, seeing the image move, watching the bulb dim — before it lives in the formula.
Everyday experiments also travel home. A student who timed a pendulum with a phone stopwatch can repeat it at home; a student who used the school's only ticker timer cannot. Homework becomes experimental — "measure the time period of three different pendulums at home and bring your readings" — and parents see physics happening at the dining table. The formulas stop being abstract when the student has measured the quantities in them personally. That is the entire pedagogy of this guide: measure first, formula second, exam third.
Motion Experiments: Seeing Newton's Laws (1-5)
1. The ramp and the stopwatch. A plank propped on books, a marble, a phone stopwatch: time the roll for different ramp heights. Students discover that steeper means faster — then calculate average speed and plot distance against time. Teaches: speed, acceleration, graphing. Materials: plank, books, marble, phone.
2. Pendulum timing. String, a stone or key, a phone stopwatch: measure the time for 20 swings at different string lengths. Students find that length changes the period but mass does not — a genuine discovery, and the Class 10 simple harmonic motion chapter made concrete. Extend it: predict the period for a new length before measuring.
3. Coin and card inertia. A glass, a card, a coin on the card: flick the card away and the coin drops into the glass. Newton's first law in two seconds — then students explain why in their own words. Follow with the tablecloth-style demo using a plastic plate. Teaches: inertia, with zero cost.
4. Balloon rocket races. String stretched across the room, straw, balloon: measure distance travelled and time, calculate speed, then vary balloon size. Teaches: action-reaction (Newton's third law), speed calculation. Run it as a class competition with a results table on the board.
5. Friction investigation. A shoe or wooden block, a spring balance (or rubber bands calibrated with known weights), different surfaces — desk, cloth, sandpaper: measure the pull needed to move it. Students discover friction depends on surface, not just weight. Teaches: friction, fair testing — change one variable at a time.
The Measure-First Rule
Light Experiments: Reflection to Refraction (6-10)
6. Mirror angle law. A small mirror (bazaar, Rs. 30–50), a torch or laser pointer (used with strict safety rules — never point at eyes), and paper: trace the incoming and reflected rays for different angles. Students discover the angle of incidence equals the angle of reflection — by measurement, not by being told. Teaches: laws of reflection.
7. Spoon mirrors. A steel spoon: the back shows an upright image, the inside shows an inverted one. Students sketch both and explain — concave vs convex mirrors, image types, all from the kitchen drawer. Teaches: curved mirrors, real vs virtual images.
8. Glass-slab refraction. A rectangular glass paperweight or a transparent soap dish filled with water, a torch beam in a darkened corner: trace the beam bending at the surface. Students measure the bend for different entry angles. Teaches: refraction, and the setup for Snell's law investigations.
9. Pinhole camera. A cardboard box, foil with a pinhole, tracing paper screen: project the classroom window upside-down inside the box. Students see image formation happening — then explain why it is inverted. Teaches: rectilinear propagation of light, image formation. Awe guaranteed.
10. Colour mixing. Torch beams through coloured cellophane (red, green, blue): overlap them and predict the result before looking. Students discover additive colour mixing — and that the "obvious" answer is often wrong. Teaches: light and colour, prediction skills.
Electricity Experiments: Circuits That Click (11-15)
11. The first circuit. Battery, LED, wire: make it light. Then add a switch from a paperclip. Every student builds one — the Class 10 electricity chapter's foundation in ten minutes. Teaches: complete circuits. Materials under Rs. 100 per pair.
12. Series vs parallel brightness. Two LEDs, one battery: wire series, observe; wire parallel, observe. Students see parallel is brighter and explain why using current division — the concept examiners love. Teaches: series/parallel, directly exam-relevant.
13. Fruit battery voltage. Lemons, copper and zinc strips (or coins and nails): measure voltage with a cheap multimeter (Rs. 500–800, one per class). Add cells in series and watch voltage add up. Teaches: cells, voltage, series addition — and the multimeter skill itself.
14. Electromagnet strength. Nail, copper wire, battery: pick up paperclips. Vary the number of coil turns and count the clips lifted — students graph turns against strength and find the relationship. Teaches: electromagnetism, variables, graphing. Genuinely investigative.
15. Homemade motor. Battery, magnet, copper coil: the homopolar motor spinning in a student's hand. Teaches: the motor effect — and delivers the single most motivating moment in school physics. Every Class 10 student should build one before the magnetism chapter test.
Linking Every Experiment to Board Exams
Experiments earn their timetable slot when teachers explicitly connect them to marks. The linking habit: after each experiment, the teacher names the textbook section and the past-paper question type it addresses — "this is why Q3(b) in the 2024 Lahore board paper asked about the angle of reflection," or "the series-parallel brightness you just saw is the diagram in Exercise 14.2." Students who see the experiment-to-exam path value the practical time; students who do not see it treat it as a break from "real" study.
Use experiments in revision too. In the final term, revisit five key experiments as demonstrations with exam questions attached: the teacher demos the pendulum, students answer three past-paper questions on SHM. The practical memory anchors the theory under exam pressure. And keep an experiment log per class — date, experiment, concept, textbook reference — which doubles as the practical record and as evidence of syllabus coverage. For the broader revision system, see our board exam preparation guide, and schedule experiment periods through the lab scheduling system so they happen weekly. The best experiments also make strong science fair entries — and for younger students, our low-cost craft activities build the same hands-on habits early.
Safety: Small Rules for a Safe Physics Lab
Everyday materials are safer than standard apparatus, but physics still needs rules. Electricity: use only low-voltage batteries (never mains electricity) for student circuits; check for short circuits getting hot — a warm battery means disconnect and recheck. Light: laser pointers only under teacher control, never pointed at eyes or faces; the torch-and-mirror experiments need no lasers at all. Motion: clear the floor before ramp and rocket experiments; marbles are retrieved, not chased. Glass: any glass mirror or slab is carried with two hands and inspected for chips before use.
The general lab safety system — rules posted, incidents reported, first-aid kit stocked — applies to physics periods exactly as it does to chemistry. A physics lab feels safe, which is precisely why the rules matter: complacency, not chemicals, is the hazard here. Five rules, enforced every period, and the cheapest lab in the school is also one of the safest.
AI Help: Muse AI
Muse AI is Meta's personal AI assistant, available in the Muse app. It can help you turn experiments into lessons — for example, drafting a worksheet for the pendulum investigation, writing exam-linked questions for the series-parallel build, or explaining a tricky concept in simple words.
Join Muse with invite code LTGSWD — in the Muse app, go to Settings > Redeem token and enter the code.
Disclosure: LTGSWD is the author's Muse invite code.