Sequence: dynami-6-Newton 3 law_english

Sequence Information
Sequence: dynami-6-Newton 3 law_english
Description:
Keywords: physics, 3rd newton's law

Run time: 1h

Delivery Mode: in class or for students study

Resources:

Outline of Activities: teaching Newton's 3rd law of motion with examples

Author view:

Audience: Middle school
Subjects: Physics
Language: English
LAMS Version: 2.5.0.
License: Attribution-Noncommercial-ShareAlike
Support Files: No files
Sharing with: Everyone in Public
Status: Active
Average Rating: 5.0 stars (5). Based on 2 reviews.
Number of downloads: 4 times
Number of previews: 12 times
Authored By:   giorgos fakiolakis
Date: 02 November 2015 04:13 PM
User Comments on dynami-6-Newton 3 law_english sequence

    dynami-6-Newton 3 law_english

    I like the video with the examples about the action-reaction forces and especially the example with the measuring of our weight on the scales.

    But I have two main objections:
    a) The force is a vector quantity and when two vectors have the same measure ,  and opposite directions they are called opposite. So the action - reaction forces are exerted on different bodies but they are opposite forces because they are vectors.
    b) The vector sum of the action - reaction forces is zero, their resultant is not zero when we are interested for the resultant of one body's forces. When we are interested for the resultant of the two bodies system's forces the resultant of the action - reaction forces is zero (intrinsic forces).

    Stavroula Koliopoulou on April 05, 2016 02:41 PM (view details)