Physics Instructional Guide

Gravitation

Physics

Quarter 4

McGraw Hill Module 7

VOCABULARY

● Gravitational Force ● Newton’s Universal Law of Gravitation

● Inertial Mass ● Gravitational Mass

● Inverse Square Law

K-12 LEARNING PROGRESSIONS (via USBE Core Guides)

Standard 3.1

END OF THE UNIT COMPETENCY WITH LANGUAGE SUPPORTS

Representation Students clearly defne the system, including: ● Two interacting objects, not in contact

● the mass or change of the objects and the distance between the center of the objects Students identify and describe Newton’s Law of Gravitation using mathematical representations: ● Gravity is a product of the masses divided by the separation distance squared ( ● ), it is only attractive. = 1 2 2 ● Make calculations with Newton’s Law of Gravitation Students identify and describe Coulomb’s Law using mathematical representations: ● Electric Force is a product of the charges divided by the separation distance squared ( ), it can be either attractive or repulsive = 1 2 2 ● Make calculations with Coulomb’s Law Mathematical modeling Students use the mathematical representations to ● predict how the force of Gravity will be affected when one or more of the factors are changed (e.g. multiplied by 2, divided by 3) ● predict how the electric force will be affected when one or more of the factors are changed (e.g. multiplied by 2, divided by 3) Analysis Students use the analysis of the ● given mathematical models to identify that the ratio of gravity and electric force between objects with a given charge and mass is a pattern that is independent of distance ● mathematical constants to determine a comparative strength between the gravitational force and electric force Students use the mathematical representations of the gravitational and electric force to ● describe why the gravitational force is only attractive while the electric force is both attractive and repulsive Students use the given formulas ● as evidence to describe how the potential energy changes as a result of distance.