Centripetal force
A mass runs its dashed orbit at a steady rate while the accent force arrow on its radius keeps pointing back at the hub.
CSS
Mechanics
15 animationsCoefficient of restitution
A ball walks down its dashed height marks, each rebound returning a fixed fraction of the last, until it settles on the plate.
CSSForce polygon closes
Three forces laid head to tail: the accent resultant stretches back to the first tail and the node rings on the frame where the polygon closes.
CSSFree-body diagram
Four force vectors on an isolated block: the applied force swells and the friction opposing it follows, while normal and weight hold steady.
CSSGyroscopic precession
A rotor spins fast enough to read edge-on and back while its axis walks slowly along the dashed precession cone above the gimbal.
CSSImpulse
A force-against-time strip runs one pulse period past the cursor, the shaded area under each pulse standing for the impulse it delivers.
CSSInclined plane
A hinged board lifts and settles while the block on it runs down toward the pin and back out as the slope flattens.
CSSLever and fulcrum
A load walks out along a beam and back inside the counterweight's moment, tipping the beam either side of balance.
CSSMoment of inertia
Two masses run out along a spinning bar to the wide dashed circle and the turn slows; pull them back to the hub and it quickens again.
CSSMomentum transfer
Two carts share one rail: the accent cart runs in, stops on contact and passes its momentum to the second, which returns it from the far stop.
CSSProjectile path
A shot climbs the dashed parabola between launch and range marks, drawing the trajectory in behind it and landing on the range tick.
CSSPulley hoist
Rope pays over a sheave: the haul side lengthens by exactly what the load side takes up, and the accent load rises and lowers with it.
CSSRecoil
A shot leaves the muzzle and the carriage takes an equal kick backwards along its rail, the paired momentum arrows above holding the balance.
CSSSliding friction
A block is dragged across a hatched surface that streams beneath it while the friction vector at the contact breathes against the drive.
CSSTorque about a hub
A lever arm on a bolted hub swings between its travel ticks as the accent force applied at its end reverses.
CSS