# Chapter 9, Motion and Force, Newtons Laws.

HideShow resource information
Newton's First Law
A body will remain at rest or will continue to move at a constant velocity so long as there is zero resultant force acting upon it.
1 of 7
Newton's Second Law (Word Definition)
The acceleration of a body is directly proportional to and in the same direction as the result force acting upon it. In addition, the acceleration is inversely proportional to the mass of the body.
2 of 7
Newton's Second Law (Equation)
F=ma, but we tend to look at acceleration, so a=F/m. (a=acceleration/ms-2, m=mass/kg, F=Resultant force/N)
3 of 7
Newton's Third Law
If body A exerts a force upon body B then body B exerts the equal and opposite force upon body A. The forces are of the same type and act upon the same line of action.
4 of 7
"Newton 3 Pairs"
1. They act upon two different bodies.
5 of 7
"Newton 3 Pairs"
2. They are of the same type. (e.g. gravitational, contact etc)
6 of 7
"Newton 3 Pairs"
3. They are always equal in magnitude and opposite direction.
7 of 7

## Other cards in this set

### Card 2

#### Front

The acceleration of a body is directly proportional to and in the same direction as the result force acting upon it. In addition, the acceleration is inversely proportional to the mass of the body.

#### Back

Newton's Second Law (Word Definition)

### Card 3

#### Front

F=ma, but we tend to look at acceleration, so a=F/m. (a=acceleration/ms-2, m=mass/kg, F=Resultant force/N)

### Card 4

#### Front

If body A exerts a force upon body B then body B exerts the equal and opposite force upon body A. The forces are of the same type and act upon the same line of action.

### Card 5

#### Front

1. They act upon two different bodies.