Conservation laws

Содержание и основные понятия

This chapter links observed phenomena, physical models, and mathematical laws, first form a qualitative picture, then explore the relationships in interactive models.
GEF · Grade 9
PIF · Baseline
theory + model
13
Chapter Pages
Three meaningful routes: concepts, laws, and model research.
13.1
Pulse and retention
Movement of the system of interacting bodies
13.2
Mechanical energy
Work, power and energy conversion
13.3
Collisions
Stroke and unresilient blow
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Study route
13.1. Pulse and retention
The pulse of the body is equal to the mass product at the speed. In a closed system, the vector sum of the pulses remains constant.
13.2. Mechanical energy
- kinetic energy is traffic-related, potentially interaction- and status-- in a conservative system, the amount of it is kept.
13.3 Collisions
- In a short collision, the internal forces are great, so the impulse of the system can often be considered to be continuing, and the kinetic energy is preserved only when the impact is sustained.
Basis of contents:
The federal work programme on physics, the GEF OSL/GS and the thematic sequence of popular school lines are written specifically for Alterna and does not reproduce textbooks.