Simple Machines Flashcards

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0
Q

Joules

A

The unit to used to measure work

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1
Q

Work

A

The result of a force moving an object over a distance

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2
Q

Newtons

A

Unit used to measure force

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3
Q

Speed

A

How fast an object goes in a certain amount of time

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4
Q

Distance

A

How far something moves

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5
Q

Energy

A

The ability to do work

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6
Q

Kinetic energy

A

Energy of motion

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7
Q

Potential energy

A

Stored energy

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8
Q

W=F*D

A

Work equal force times distance

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9
Q

Machine

A

A tool used to make work easier

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10
Q

Simple machine

A

Usually consists of 1 or 2 parts

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11
Q

Lever

A

A rigid bar that turns around a fulcrum

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12
Q

1st class lever

A

The fulcrum is between the effort and load

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13
Q

Examples of 1st class machines

A

Seesaw, scissors, pliers

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14
Q

2nd class lever

A

The load is between the effort and the fulcrum

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15
Q

Examples of 2nd class levers

A

Wheel barrel, nut cracker, paper cutter

16
Q

3rd class lever

A

The effort is between the fulcrum and the load

17
Q

Examples of 3rd class levers

A

Tweezers, broom, baseball bat, fishing pole

18
Q

Wedge

A

A double inclined plane. Most commonly used to push apart

19
Q

Examples of wedges

A

Door stop, axe, knife, shoehorn

20
Q

2 types of Wheel and axles

A

Fixed axles and non spinning axle

21
Q

Fixed axle

A

Wheel and axle roll together

22
Q

Non Spinning axle

A

Axle stays still, wheels move at different speeds

23
Q

3 types of pulleys

A

Fixed pulleys, movable pulley, block and tackle

24
Q

Fixed pulley

A

Its built to a higher level

25
Q

Movable pulley

A

Moves with load

26
Q

Block and tackle pulley

A

Combination of 2 types of pulleys : fixed and movable pulleys

27
Q

Screw

A

Inclined plane fixed around a wedge Screws enable things to move