Nano PHYSICS . MECHANICS . MOMENTUM AND COLLISIONS . LINEAR MOMENTUM

Momentum of a System of Particles

System momentum is the vector sum of the momenta of all particles. Learn the summation idea, internal versus external forces preview, and why systems matter.

Physics · Mechanics · Momentum and Collisions · Linear Momentum · Momentum of a System of Particles
Access for this nano-lesson
Unsigned visitors can show & copy prompts for Steps 1-3. Signed-in free accounts can also Run with AI for Steps 1-2. Paid accounts unlock everything (Steps 1-6 + Help prompts + AI).
Steps 1-3 Free Steps 4-6 Paid
STEP 1
Orient: momentum of a system of particles
Free
Establish momentum as mass times velocity with vector meaning and physical interpretation.
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Goal: define linear momentum using mass, velocity, vector direction, and units.
STEP 2
Conceptual grounding: build the linear-momentum model
Free
Build a workflow for mass, velocity, signs, components, system sums, frames, and units.
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Goal: compute and compare momentum for particles, objects, and systems using signs or components.
STEP 3
Real-world connection: interpret momentum in particles and systems
Free
Apply momentum reasoning to particles, systems, reference frames, force connections, and energy comparisons.
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Goal: explain frame dependence, system momentum, rate of change of momentum, and momentum-energy contrasts in physical contexts.
STEP 4
Check your understanding: diagnostic mini-quiz
Paid
Attempt each question before revealing the linear-momentum reasoning.
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Goal: identify and correct vector, unit, system, frame, and momentum-versus-energy errors before they become calculation errors.
STEP 5
Practice: solve increasingly rich linear-momentum situations
Paid
Apply the model to situations that grow in complexity.
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Goal: write concise, physically justified linear-momentum calculations and explanations.
STEP 6
Summary & reflection + explorations
Paid
Consolidate the model and explore changing mass, velocity, direction, system, frame, and comparison variables.
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🔒 ▶ Explore interactive simulation
Goal: carry the model forward into impulse, collisions, conservation of momentum, and energy comparisons.