Laws of Motion
16 topics · 16 interactive simulations
Newton's First Law
Inertia — object at rest stays at rest; object in motion stays in motion. Toggle friction to see the difference.
Newton's Second Law
F = ma — apply a force, change the mass, see acceleration respond in real time.
Newton's Third Law
Action–reaction pairs — equal magnitude, opposite direction, act on different bodies.
Newton's Laws of Motion
Experience all three laws of Newton through interactive demonstrations — from inertia to action-reaction pairs.
Free-Body Diagram Builder
Build FBDs for flat, push, inclined, and hanging scenarios — see all forces labelled.
Static vs Kinetic Friction
See the difference between fₛ (adjustable up to μₛN) and fₖ (constant) in action.
Friction & Inclined Planes
Explore static and kinetic friction on flat and inclined surfaces. Adjust angles and coefficients to see real-time effects.
Inclined Plane (with Friction)
Block on incline — compute gsinθ, gcosθ, friction, net acceleration, angle of repose.
Atwood's Pulley
Two masses over a pulley — live acceleration and tension from a = (m₂−m₁)g/(m₁+m₂).
Connected Blocks
Two blocks pulled by a force, connected by a string — compute shared a and tension T.
Elevator: Apparent Weight
N = m(g+a) — feel heavier going up, lighter going down, weightless in free fall.
Banked Road
Turn on a banked curve — compute vIdeal, vMax, vMin with and without friction.
Force Resolution
Resolve a force at angle θ into Fx = F cosθ, Fy = F sinθ — see the components in real time.
Angle of Repose
Tilt the incline until the block just slides — see θ_repose = tan⁻¹(μ_s) emerge.
Wedge Problems (frictionless)
Block on movable wedge — both accelerate. See the recoil and coupled motion.
Centripetal Force (String)
Mass on a string in circular motion — tension provides T = mv²/r live.