11/14/2012

1

NEWTON’S 2ND LAW

GRADE HOMEWORK

� Identifying Forces

FORCE NET

�We know that the acceleration is due to ALL of

the forces acting on an object

� The net force is the total of all of the forces

� If there are any forces in both dimensions, just

do vector addition, as before

11/14/2012

2

NORMAL FORCE

Fnorm1Fnorm2

11/14/2012

3

Fnorm1

Fnorm2

Fnorm3,4

SIMPLE NORMAL FORCE

Fnorm = Fgrav

HOMEWORK