Momentum
Part of the Mechanics section of Coddy's Physics journey. Lesson 62 of 94.
Momentum is mass times velocity:
p = m v
It points the same way as the velocity, and its unit is kg·m/s. On a line, a momentum the negative way is negative.
A light object can match a heavy one by moving faster: 1 kg at 8 m/s and 4 kg at 2 m/s both have 8 kg·m/s.
A light, fast cart and a heavy, slow cart can carry the same momentum.
Challenge
A 0.16 kg hockey puck slides across the ice with a momentum of 4 kg·m/s. Find its speed v.
Try it yourself
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Mechanics
1Vectors and Newton's Laws
Right TrianglesWhat is a Vector?Adding VectorsAxes and DirectionsVector ComponentsForces Around UsFriction and TensionNewton's First LawNewton's Second LawNewton's Third LawRecap - Net Force2Friction
What is Friction?Static FrictionKinetic FrictionFriction and Newton's LawsRecap - Sliding Crate3Inclined Planes
Forces on an InclineGravity ComponentsFrictionless InclineIncline with FrictionWill It Slide?Recap - Ramp Challenge6Projectile Motion
Independent AxesHorizontal LaunchLaunch at an AngleRange and Max HeightRecap - Hit the Target9Work and Energy
WorkKinetic EnergyWork-Energy TheoremGravitational PEConservation of EnergyPowerRecap - Roller Coaster12Impulse and Momentum
MomentumImpulseConservation of MomentumElastic CollisionsInelastic CollisionsRecap - Air Track15Simple Harmonic Motion
What is SHM?Mass on a SpringThe PendulumSHM GraphsEnergy in SHMRecap - Oscillator