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1
Q

What’s a force

A

A force is a push or a pull that acts on a object in order to do many things in your daily life.

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2
Q

Whats a example of a force?

A

Pushing a textbook, kicking a ball

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3
Q

What are the types of forces?

A

Some contact forces include the following; tension, compression, shear, air resistance, friction,normal,spring. Those are contacts, non contact forces include, gravity, electric, magnetic

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4
Q

How do you calculate an unbalanced net force

A

if its like up, down. you subtract the biggest from the smallest and carry the sign

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5
Q

How to calculate net force if acting like on the same way, -> and ->

A

you add

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6
Q

What’s mass

A

Mass is a universal measure of matter in an object. It is measured in KG.

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7
Q

What’s weight

A

it is how the gravitational pull impacts the amount of mass in an object, it changes depending on where you are.

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8
Q

How strong is the force of gravity

A

9.8 N

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9
Q

What is friction

A

Friction is the force that resists motion betweeen two objects in contact with each other

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10
Q

What are the two types of frction

A

Static, slidiing

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11
Q

Whats static friction

A

prevents objects from starting to move

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12
Q

whats sliding friction

A

opposes the motion of a sliding object

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13
Q

What is work

A

Work is the trnasfer of energy thru movement. work is done when an object moves a distance parrelell to the force applied

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14
Q

What’s is energy

A

The ability to do work. Its the ability to apply a force to move an object a distance.

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15
Q

How is energy lost in ME (Physical systen)

A

It is commonly transformend to thermal energy in parts, or vibrations/ unwanted sounds.

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16
Q

How is energy lost in social system

A

By using to much materials, time or human energy needed.

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17
Q

The cons of reducing energy

A

it can cause job loss

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18
Q

How can you make a system work more efficent

A

by using new technology like robotics.

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19
Q

Whats ME namend in social systems

A

economic effiency

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20
Q

Whats a physical system

A

A group of physical parts that work together to perform a function

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21
Q

Name me all the six simple machines

A

Screw, Pulley, Wheel and axle, lever, inclined plane, wedge

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22
Q

Whats a example of a physical system (with the industry thing)

A

A phone (Phone is made to provide communication, in the communication industry) A crane (Crane is part of construction industry, used to lift heavy objects) Lawn mower (Part of the green industry, used to cut grass) Therapist (Part of service industry used to make people happier) Car (Part of transportation system, used to transport people

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23
Q

Whats a social system

A

A group of people/organisms joining together to perform tasks/ establish relationships

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24
Q

Give an example of each social system and a industry

A

Industry: Communication Social System: Classroom, chat groups, adds, news reporter, playground. Industry: Construction. Social System: Designer, builder, investor, engineer. Industry: Green Social system: Garbage man, bee, gardener. Industry : Transportation Social System: Pilot, staff, union

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25
Define a natural system.
A natural system is naturally made in the environment without human intervention
26
Define A human made system
A human made system is made to achieve certain goals, a human made system is built by humans.
27
Whats input
Something a machine needs to work
28
Give example of a natural system
Bee colony, river, animals interacting
29
Give a example of a human made system
Watches, cars, goverment
30
Deffine side effects
A unknown/ undesired output
31
Give example of side effects
Getting stung by a bee
32
What does a screw consist off/ definition
A cylinder with grooves, cut in a spiral on the outsides
33
An example of a screw, what is a screw similar to
Bolt, drill, screw, water bottle rim. A screw is similar to an inclined plane
34
Whats a pulley
Made from wire, rope and a cable moving on a grooved wheel.
35
Whats a example of a pulley
Flagpole, construction crane fishing rod, elevator
36
What's a wheel and axle
Its made from 2 wheels with difffrenct diamaters that turns together,
37
Whats a example of wheel and axle
A steering wheel, bike pedal, alan key
38
What are types of levers, where is the fulcrum, load, effort in
Class 1: Load, Fulcrum, Force. Example: scissores Class 2: Fulcrum, Load, Force. Example: Wheel barrow, nut cracker, bottle opener. Class 3: Fulcrum, Force, Load. Example: Fishing rods, Baseball bat, Broom
39
Whats a lever
A rigid bar or plank that rotates around a fixed point called the fulcrum, it helps people move a larger load, but they must move a greater distance than the load
40
Whats a inclined Plane
A flat surface at an angle to another flat surface, it helps them move a large load, they must move a greater distance than the load, the ramp cant be to steep to work though
41
What is a example of a inclinded plane
Ramp to load trucks, staircase ramp
42
Whats a wedge
It is a inclined plane forced into a object, it splits a object, but can only be applied in one dirrection. Enables the user to apply a greater force to split a object, but they must move a greater distance than the split
43
Whats a example of a wedge
Axe, Knifes, needles, dorr stops, animal teeth, chisels
44
Is MA or ME unitless
MA, MA is unit less. ME ends in percent
45
When energy is lost, what is it commonly transformed to
Thermal, vibrations, or unwanted sounds
46
How can you make systems work smoothly
by reducing energy
47
What’s physical system
A group of physical parts that work together to perform a function
48
Social system define
A group of people or other organisms joining together to perform tasks/ establish relationships
49
Define force
Any push or pull
50
Define input
The force, energy or raw materials that you put into a system
51
Define output
The task or service that a system performs
52
Define side effects
The unintended/undiserued output of a system
53
System thinking
Taking into consideration the input and output and side effects of a system
54
Simple machine
A device that requires a single force to work; made from 1-2 parts
55
Fulcrum
The pivot point of a lever
56
Load arm
The part of a lever that extends from the fulcrum to the load
57
Effort arm
The part of the lever that goes from the fulcrum to where you push/pull
58
Input force
The effort force applied to the lever
59
free
free
60
Load force
The force the input force needs to overcome to make something move
61
Static friction
Holds an objects movement from being moved across an objects surface
62
Friction
The force that prevents objects from moving across another objects surface
63
Sliding friction
Acts like a brake when an objects surface slides against another objects surface
64
Lubricant
A substance that prevents friction, allowing surfaces to slide easier
65
Inertia
A property of matter which remains at rest or unchanging motion unless acted on by a entertact force
66
MA
The ratio of output force to input force for a given machine
67
Ideal MA
The mechanical advantage of a machine if all the input force is converted into output force; however this is never possible irl applications
68
Actual MA
The MA of a machine irl application; equal to ideal MA minus force lost due to friction, slippage, distortion, (Basically the MA of a machine, when some input is lost due to like firction, slipage, disortation
69
Work
The measure of energy transfer that occurs when an object is moved over a distance by an external force The result when a force moves an object a certain distance
70
Energy
The ability energy is the ability to do work
71
Automation
The replacement of human workers by technology
72
Work formula
W=fd
73
Force formula
f=w/d
74
Distance formula
w/f
75
Class 1 lever fulcrum load and force position
LOAD FULCRUM FORCE
76
Class 2 lever fulcrum load and force position
FULCRUM LOAD FORCE
77
Class 3 lever fulcrum load and force position
FULCRUM, FORCE, LOAD
78
Whats a industry
An industry is related physical and socal systems combined in a complex way. Industries produce a specific class of goods/ services people need
79
Give me the 5 main industry/ common.
Communication, construction, green, service, transportation
80
Deffine Evolution
When systems change to accomadate for changes in living condition, social, and new tech
81
Net force
The overall force acting on an object is called the net force
82

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