Flashcards in Newtons 1st Law Deck (19):

0

## Newtons first law is often called

### Law of inertia

1

## What is the law of inertia

### An object will have constant motion unless there is an unbalanced force acting on it

2

## A force is

### A push or a pull on an object

3

## A force is ...

### A vector measurement (has both magnitude and direction )

4

## Symbol for force

### N

5

## Unit for force

### Newtons

6

## Contact forces

###
Frictional

Normal

Applied

Spring

Tension

7

## Action at a distance forces

###
Gravitational

Electrical

Magnetic

8

##
Gravitation force

Symbol?

Usually described as?

Unit

Formula

###
Symbol: Fg

Force of gravity is usually described as objects WEIGHT

Unit kg

Formula Fg=m•g

(g= gravitational pull 9.8N/kg)

9

##
Symbol for mass

Measures in what unit?

###
Symbol: m

Unit kg

10

##
Normal/support force

Symbol?

###
Symbol Fn

For an object at rest on a horizontal surface, the support force must equal the objects weight (Fg)

- force is perpendicular to a surface

11

## Net force

###
Sum of all forces acting on a object

Represented by (sum)F

12

## Force vectors

###
A vector is an arrow that represents the magnitude and direction of a quantity

Stronger forces represented by longer arrow

13

## A free body diagram

###
Is a diagram that shows all the forces acting on a object

- show the forces acting on a point source, with The forces pointing away from a object

14

## Resultants

###
It's the sum of two or more vectors

Same direction: add

Opposite: subtract

15

## Mechanical equilibrium

###
A state wherein NO physical changes occur

- whenever the net force on an object is 0,

-mathematically expressed as (sum)F=0

16

##
- whenever the net force on an object is 0 object is in___

Known as____ rule

###
Mechanical equilibrium

Equilibrium rule

17

## Static equilibrium

### Objects at rest

18