All coursesCourse
Mechanics Extended
The full course — every projectile case, statics, oscillations and the exam-grade problems in between.
29 lessons6 chapters~11hno sign-up
The full course — every projectile case, statics, oscillations and the exam-grade problems in between.
29 lessons6 chapters~11hno sign-up
Before you can explain motion, learn to describe it exactly — speed, direction, and how they change.
What one number captures how fast something moves.
Read a whole journey from the shape of two lines — slope and area.
0 to 30 m/s in 3 s vs 15 s — which is fiercer?
Four equations that crack any constant-acceleration problem.
Hammer and feather hit the Moon dust together — here's why.
Two independent motions — one falling, one flying.
Throw a stone off a sea cliff — why "up time" no longer equals "down time".
Aim, adjust, and land on the target — the two angles that both hit.
Newton's big idea: a force is what changes motion. Meet the everyday forces that push and pull.
Draw every force on an object — the core skill of mechanics.
Where to sit on a seesaw to balance someone twice your weight.
Balance a loaded, non-uniform beam — and find the hidden support forces.
Why a ladder slips — the friction and forces that keep it standing.
Forces, mass, and why trucks take longer to stop.
A truck hits a fly: which pushes harder? (Trick question.)
Why ice is slippery and rubber grips — static vs kinetic friction.
Tilt a ramp steeper and steeper — until the crate lets go.
Stretch a spring twice as far — force doubles. The simplest rule in mechanics.
Tracking forces moment by moment is hard. Energy lets you jump straight to the answer — and power is how fast you get there.
Double your speed — why does stopping take 4× longer?
Why a rollercoaster needs no engine once it crests the first hill.
Race a straight ramp against a curve — the longer path wins, every time.
Same work, half the time — that's double the power.
A second quantity nature never loses — the master key to collisions and recoil.
Aim a force sideways and motion curves — from a bend in the road to the Moon's orbit.
Springs and pendulums weave forces, energy, and time into one elegant, repeating pattern.