Simple Machines Explainer makes physics problems approachable and genuinely interesting. It works through calculations step-by-step, connects formulas to real-world examples, and helps your child understand the underlying concepts — not just memorise equations.
Open Applaa and go to AI Assistants.
Type your physics problem — include any numbers, units, or values.
Get a full worked solution with the reasoning clearly explained at every step.
Pulley, Lever, Inclined Plane. Here are some of the most popular ways students use Simple Machines Explainer every day:
Simple machines—levers, pulleys, inclined planes, wedges, screws, and wheels—are the foundation of all human engineering, from ancient Egypt to modern industry. Yet many UK students view them as abstract concepts rather than tools that help us do more work with less effort. Applaa's Simple Machines Explainer demystifies these by showing exactly how each machine trades effort for distance: use a shorter lever and you multiply force but travel farther; use a pulley and you distribute weight across rope; climb an inclined plane and you reduce steepness at the cost of distance. This tool covers GCSE Physics machines, explores mechanical advantage and velocity ratio, and reveals why 'no machine is 100% efficient'—friction always steals energy. See interactive diagrams for each machine, input forces and distances, and instantly calculate the mechanical advantage. Whether you're tackling coursework, revising for mocks, or simply curious how door handles, scissors, and car jacks work, this explainer makes simple machines unforgettably clear.
Choose a machine type (lever, pulley, inclined plane, wedge, or screw) and interact with the animated diagram. The tool shows load force, effort force, and distance moved for each. Input the load weight and the machine's dimensions, and it calculates mechanical advantage (output force ÷ input force) and efficiency percentage. Use the 'real-world examples' tab to see how each machine appears in everyday objects: scissors are levers, car lifts use hydraulic levers, ramps are inclined planes. This grounding in reality makes the maths meaningful.
The biggest misconception is that machines multiply both force and distance—students forget the fundamental trade-off: gain in force always means loss in distance. Mechanical advantage of 3 means you can lift 300 kg using only 100 kg effort, but you must pull rope 3 metres while the load rises only 1 metre. Another trap: thinking efficiency can exceed 100% (it cannot). Friction always reduces efficiency below the theoretical ideal calculated from geometry alone. These errors repeatedly cost exam marks.
Getting started
Download Applaa free and interact with each machine simulator—play with lever position, pulley number, and ramp angle to build intuition
Solve four GCSE coursework or past-paper questions about simple machines, using the tool to verify your mechanical advantage calculations
Explore efficiency: calculate both the theoretical (frictionless) and real efficiency for three machines, understanding where friction hides
Daily review: one new machine scenario each morning (e.g. car jack, door handle, scissors); within a week, you'll predict output force before calculating
Give your child the same AI app-building, exam prep and tutoring edge — free for the first month, no credit card needed.
Join 10,000+ students building their first AI-powered apps with Applaa
No—you can multiply force by 5, but you must move the effort end 5 times as far. A lever with MA = 5 lifting a 100 kg load means you apply only 20 kg force, but you pull down 5 metres while the load rises 1 metre. The work done is the same (neglecting friction); the lever just redistributes effort and distance.
Because a ramp reduces the steepness, giving mechanical advantage: a wheelchair user needs much less force over a longer distance. A 1-metre-high ramp at 5° angle might require a user to push with half their weight instead of full weight, making it accessible. Stairs require lifting your full weight with every step.
Yes—a screw is an inclined plane wrapped around a cylinder. A tighter thread (smaller pitch) has higher mechanical advantage but requires more turns. The tool shows this by converting the screw to an equivalent inclined plane and calculating MA.
Friction reduces real efficiency below the theoretical (frictionless) mechanical advantage. A lever with theoretical MA = 5 might have real efficiency of 90%, meaning you need slightly more than 20 kg effort to lift a 100 kg load—the extra effort overcomes friction. Applaa's tool calculates both.
Simple Machines Explainer and 500+ other safe AI assistants are available free inside the Applaa desktop app.
Explore GCSE, 11+, A-Level, and Olympiad revision modules in the Applaa Learning Hub.
Go to Learning Hub