Forces & Motion
What makes things start, stop, turn, and stay put.
Torque balance
a cargo crane leaning over a flooded rail yard
Torque rigEnter mission M002FoundationLever arms
a field workshop lifting a generator with a scaffold pole
Torque rigEnter mission M003FoundationCenter of mass
a rescue plank bridging a collapsed stairwell
Torque rigEnter mission M004FoundationStatic friction
a loading ramp where crates keep sliding on wet steel
Friction sledEnter mission M005FoundationNewton's first law
a cable car stalled halfway across a gorge
Force cartEnter mission M006FoundationNewton's second law
a magnetic launch sled on a test track
Force cartEnter mission M007FoundationMomentum transfer
a docking clamp catching a drifting supply pod
Collision trackEnter mission M024ChallengeProjectile paths
a line-throwing gun firing a rescue rope across a river
Launch arcEnter mission M026FoundationBalancing a seesaw
a playground seesaw with two children of very different size
Equation balanceEnter mission M027FoundationPushing a loaded cart
a market porter shifting a loaded handcart off a kerb
Force cartEnter mission M028ExplorerCrowbar leverage
a stagehand levering a crate lid with a flat bar
Torque rigEnter mission M029ExplorerBraking friction
a loading-bay conveyor whose emergency brake pad is being set
Friction sledEnter mission M030ChallengeConserving momentum
a shunting yard coupling a moving wagon to a stationary one
Collision trackEnter mission M051FoundationSpeed, distance and time
a school bus route being timetabled to arrive before the bell
Collision trackEnter mission M055FoundationPulleys and effort
a builder hoisting mortar to a first-floor scaffold
Equation balanceEnter mission M056ExplorerBalanced forces in fall
an aid drop being rigged so crates land intact
Friction sledEnter mission