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Flashcards in Newtons 1st Law Deck (19):
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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

Dynamic equilibrium

Object moving at a constant speed in a straight line path