systems in action Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what’s the definition of a system?

A

a group of parts that work together to preform a task.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is a physical system?

A

a system made of parts.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is a social system?

A

a system made of people or living organisms.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what’s the definition of a force?

A

a push or pull that acts on an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is a contact force?

A

a contact force must touch the object it is acting on.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is an action-at-a-distance force?

A

a force that act on an object without touching it.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what’s the definition of friction?

A

a force that resists the motion, usually two surfaces rubbing against eachother.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what’s the definition of mass?

A

the amount of matter in an object.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what’s the definition of weight?

A

How heavy something is due to gravity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what’s the definition of work?

A

work is done when a force causes an object to move a distance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what’s the definition of energy?

A

the ability to do work.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is Kinetic Energy?

A

The energy of an object in motion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is potential energy?

A

stored energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what’s the definition of a machine?

A

Any mechanical system that reduces the force required to accomplish work.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is input/effort force?

A

the force applied to the machine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the output/load force?

A

the force that applies to the object.

17
Q

What is the maximum amount of pulleys used to preform a task?

A

You can use 4 pulleys to maximize the MA.

18
Q

Name all 6 different simple machines.

A

LIPSWWa

Lever, Inclined Plane, Pulleys, Screw, Wedge, Wheel and Axle.

19
Q

Name a lever example that is greater than 1.

A

Nutcracker, Bottle opener, Scissors, ect.

(Any class 1 or 2 lever.)

20
Q

Name a lever example that is equal to 1.

A

Single fixed pulley or Seesaw.

21
Q

Name a lever example that is less than 1.

A

Tennis racket, Hockey stick, Baseball bat, ect.

(Any class 3 lever.)

22
Q

List an example of a physical system. (on test)

A

-Clock
-Car
-Phone
-Blinds

23
Q

List an example of a social system. (on test)

A
  • Healthcare system
  • Education system
  • Communities
24
Q

List an example of an input and output force. (on test)

A

Input: Battery
Output: To cool you down.
(^for fan^)

Input: Peddles
Output: To ride down a trail.
(^for bike^)

25
Q

List an example of a contact force. (on test)

A
  • Kicking a ball
  • Opening a door
  • Playing Tag of War
26
Q

List an example of an action-at-a-distance force. (on test)

A
  • Gravity
  • Magnetic
  • Static Electricity
27
Q

List an example of a kinetic energy.

A
  • Walking
  • Ball rolling down a hill
  • Flying Airplane
28
Q

List an example of potential energy

A
  • stretched rubber band
  • dynamite
  • water behind a dam
29
Q

what are the 3 things machines can do?

A

Increase the force or distance, and change the direction.

30
Q

What units is mass measured with?

A

kg, g, or mg

31
Q

what units are weight measured with?

A

Newtons (N)

32
Q

What are the 3 advantages of class 3 levers?

A

They give you speed, distance and accuracy. (but they are harder to use)

33
Q

What is a natural social system? (on test)

A
  • Beehive
  • Wolfpack
  • Ant colony
34
Q

What is the input also known as? (on test)

A

The input is also known as the effort.

35
Q

What is the output also known as? (on test)

A

The output is also known as the load.

36
Q

What is the pivot point also known as? (on test)

A

The pivot point is also known as the fulcrum.

37
Q

Why cant a machine be 100% efficient?

A

Because friction steals some of the input on the machine.