Simple Machines Simulator
Lever • Pulley • Inclined Plane • Wheel & Axle • Screw • Wedge — Simulate • Explore • Practice • Quiz
1 Overview
This free simple machines mechanical advantage simulator lets you explore all six classical simple machines: lever, pulley, inclined plane, wheel and axle, screw, and wedge. For each machine, the interactive animation shows how effort and load forces relate, while real-time readout cards display Mechanical Advantage (MA), Velocity Ratio (VR), and Efficiency.
Whether you are learning about first-class levers, block-and-tackle pulley systems, or the relationship between effort distance and load distance, this tool provides instant visual feedback with animated force vectors, accurate scale drawings, and precise numerical results — all without downloads or plugins.
2 Getting Started
The simulator opens in Simulate mode with the Lever machine selected. The canvas shows an animated lever with effort and load arrows. Above the canvas, badge cards display MA, VR, Efficiency, and Machine type at a glance.
Use the Machine pills to switch between the six machine types. Each machine has its own set of sliders and parameters. The four mode pills (Simulate, Explore, Practice, Quiz) at the top let you switch between hands-on simulation, concept study, random problem practice, and timed quizzes.
Presets like Wheelbarrow, Fishing Rod, Crane Pulley, and Car Jack configure realistic scenarios with a single click.
3 Simulate Mode
Select a machine type and adjust its parameters using the sliders. Press Simulate to watch the animated operation, and Reset to return to the starting position.
Lever: Choose 1st, 2nd, or 3rd class. Adjust effort, load, effort arm, and load arm. MA equals the effort arm divided by the load arm.
Pulley: Choose Fixed, Movable, or Block & Tackle. Set the number of pulleys (1–6), effort, load, and diameter. MA for a block-and-tackle system equals the number of rope sections supporting the load.
Inclined Plane: Set the ramp angle, load weight, applied effort, and friction μ. The ideal MA is 1/sin(angle). With friction, actual MA is lower and efficiency drops.
Wheel & Axle: Adjust wheel radius and axle radius. MA equals wheel radius divided by axle radius.
Screw: Set pitch and handle length. MA = 2πL/P, where L is handle length and P is pitch.
Wedge: Adjust the wedge angle and applied force. Narrower wedges produce greater splitting force.
4 Explore Mode
Explore mode offers concept cards across three categories: Fundamentals (MA, VR, efficiency, work-energy), Machine Types (one card per machine), and Advanced (compound machines, friction losses, real-world applications). Each card contains a definition, formula, diagram, and worked example.
Use this mode to review key relationships: MA = Load/Effort, VR = distanceeffort/distanceload, and Efficiency = (MA/VR) × 100%. Understanding these three quantities is essential for any simple machines exam.
5 Practice & Quiz
Practice mode generates random problems across all six machine types. Typical problems include calculating effort for a given load and MA, finding the efficiency of a pulley system, or determining the angle of an inclined plane needed for a specific VR. Full step-by-step solutions are shown when you answer incorrectly.
Quiz mode presents 5 randomised multiple-choice questions per session. Questions cover machine identification, MA/VR calculations, lever class identification, and efficiency comparisons. Your score and per-question breakdown are shown at the end.
6 Tips & Best Practices
- Compare lever classes: Switch between 1st, 2nd, and 3rd class levers to see how fulcrum position affects MA and the direction of effort.
- Add pulleys incrementally: Start with 1 pulley and add more to see MA increase linearly in a block-and-tackle system.
- Add friction to the inclined plane to see how real-world efficiency drops below the ideal — a critical lesson for engineering design.
- Use presets to explore realistic applications before building custom configurations.
- Watch the Work readout: It confirms that work input equals work output (minus friction losses), demonstrating energy conservation.
- The simulator works fully offline once loaded — ideal for classrooms without internet access.
Understanding Simple Machines — Mechanical Advantage, Velocity Ratio & Efficiency
Simple machines are the fundamental building blocks of all mechanical devices. There are six classical simple machines: the lever, pulley, inclined plane, wheel and axle, screw, and wedge. Each one allows you to trade force for distance, making it easier to perform work. The key measures of a simple machine are Mechanical Advantage (MA), which is the ratio of load to effort, Velocity Ratio (VR), which is the ratio of the distance moved by the effort to the distance moved by the load, and Efficiency, calculated as MA divided by VR times 100 percent. An ideal machine with no friction has 100% efficiency, but real machines always have some losses due to friction and deformation.
How Simple Machines Multiply Force
A lever multiplies force by using a rigid beam that pivots around a fulcrum. First-class levers (like a seesaw) have the fulcrum between the effort and the load; second-class levers (like a wheelbarrow) have the load between the fulcrum and effort; third-class levers (like a fishing rod) have the effort between the fulcrum and load. The mechanical advantage of a lever equals the effort arm divided by the load arm. A pulley system redirects or multiplies force using ropes threaded through wheels. Fixed pulleys change direction; movable pulleys provide mechanical advantage equal to the number of rope sections supporting the load. A block and tackle system combines both for even greater advantage.
Inclined Planes, Screws & Wedges
An inclined plane (ramp) reduces the effort needed to raise an object by spreading the work over a longer distance. Its ideal mechanical advantage is 1/sin(angle). The screw is essentially an inclined plane wrapped around a cylinder — one turn advances the screw by its pitch, while the effort travels a much larger circle (2 times pi times the handle length). The wedge is a double inclined plane that converts a horizontal force into two perpendicular splitting forces. The wheel and axle works like a rotating lever, where the mechanical advantage equals the wheel radius divided by the axle radius. All compound machines, from cars to cranes, are combinations of these six simple machines working together.
Who Uses This Simulator?
This simulator is designed for mechanical engineering students, physics students studying classical mechanics, technical education trainees learning about force and motion, and instructors teaching simple machines, mechanical advantage, and work-energy principles. It provides visual, hands-on understanding of how each machine type transforms force and distance without requiring laboratory equipment.
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