# PS 100 Chapter 2

### 17 terms by dswaze

#### Study  only

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### Newton's First Law

Every object at rest, or in uniform motion, will remain in that state of motion unless compelled to do otherwise by forces acting upon it

### uniform motion

motion at a constant speed in a straight line

### state of uniform motion

the condition of an object when no unbalanced forces act upon it; a state of motion always refers to being at rest or in uniform motion

### force

a push or pull on an object

### velocity

the speed in a particular direction of a moving body

### acceleration

rate of change of velocity per unite time, or change of velocity divided by the time required for the change

towards a center

### Newton's Second Law

the net force of an object is equal to the product of it's acceleration and mass.

### unbalanced forces

the portion of the total force that is unopposed by other forces and so will cause an acceleration; an unbalanced force means that the net force is not zero

### mass

the characteristic of a body which determines how much it accelerates when a force is applied

### weight

a measure of the force of gravity pulling on an object

### Force=

Mass x Acceleration

Force/Mass

### Forces occur...

only when two things interact with each other

### All forces result from...

interactions between pairs of objects, each object exerting a force on the other; the two resulting forces have the same strength and act in exactly opposite directions

### Force of you on the Earth=

Force of the Earth on you

Example: