systems in action

Question 1

what’s the definition of a system?

Answer 1

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

Question 2

what is a physical system?

Answer 2

a system made of parts.

Question 3

what is a social system?

Answer 3

a system made of people or living organisms.

Question 4

what’s the definition of a force?

Answer 4

a push or pull that acts on an object

Question 5

what is a contact force?

Answer 5

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

Question 6

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

Answer 6

a force that act on an object without touching it.

Question 7

what’s the definition of friction?

Answer 7

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

Question 8

what’s the definition of mass?

Answer 8

the amount of matter in an object.

Question 9

what’s the definition of weight?

Answer 9

How heavy something is due to gravity.

Question 10

what’s the definition of work?

Answer 10

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

Question 11

what’s the definition of energy?

Answer 11

the ability to do work.

Question 12

what is Kinetic Energy?

Answer 12

The energy of an object in motion.

Question 13

what is potential energy?

Answer 13

stored energy

Question 14

what’s the definition of a machine?

Answer 14

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

Question 15

what is input/effort force?

Answer 15

the force applied to the machine.

Question 16

what is the output/load force?

Answer 16

the force that applies to the object.

Question 17

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

Answer 17

You can use 4 pulleys to maximize the MA.

Question 18

Name all 6 different simple machines.

Answer 18

LIPSWWa

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

Question 19

Name a lever example that is greater than 1.

Answer 19

Nutcracker, Bottle opener, Scissors, ect.

(Any class 1 or 2 lever.)

Question 20

Name a lever example that is equal to 1.

Answer 20

Single fixed pulley or Seesaw.

Question 21

Name a lever example that is less than 1.

Answer 21

Tennis racket, Hockey stick, Baseball bat, ect.

(Any class 3 lever.)

Question 22

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

Answer 22

-Clock
-Car
-Phone
-Blinds

Question 23

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

Answer 23

• Healthcare system
• Education system
• Communities

Question 24

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

Answer 24

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

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

Question 25

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

Answer 25

- Kicking a ball - Opening a door - Playing Tag of War

Question 26

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

Answer 26

- Gravity - Magnetic - Static Electricity

Question 27

List an example of a kinetic energy.

Answer 27

- Walking - Ball rolling down a hill - Flying Airplane

Question 28

List an example of potential energy

Answer 28

- stretched rubber band - dynamite - water behind a dam

Question 29

what are the 3 things machines can do?

Answer 29

Increase the force or distance, and change the direction.

Question 30

What units is mass measured with?

Answer 30

kg, g, or mg

Question 31

what units are weight measured with?

Answer 31

Newtons (N)

Question 32

What are the 3 advantages of class 3 levers?

Answer 32

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

Question 33

What is a natural social system? (on test)

Answer 33

- Beehive - Wolfpack - Ant colony

Question 34

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

Answer 34

The input is also known as the effort.

Question 35

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

Answer 35

The output is also known as the load.

Question 36

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

Answer 36

The pivot point is also known as the fulcrum.

Question 37

Why cant a machine be 100% efficient?

Answer 37

Because friction steals some of the input on the machine.