Determination for the modal age level for the grades IV and VI of the difficulty of the principle: a body at rest remains at rest, and a body in motion continues to move at constant speed along a straight line, unless the body is acted upon in either case by an unbalanced force.

Thesis (Ed.M.)--Boston University

Bibliographic Details
Main Author: Jackman, Robert H
Language:en_US
Published: Boston University 2015
Online Access:https://hdl.handle.net/2144/10665