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Science > Simple Machines > Flashcards

Simple Machines Flashcards

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1
Q

Device that makes doing work easier

A

Machine

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2
Q

Machine that does work with only one movement of the machine

A

Simple Machine

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3
Q

Two or more simple machines that operate together

A

Compound Machine

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4
Q

Bar that is free to pivot around a fixed point

A

Lever

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5
Q

Fulcurm is between the input force and output force

A

1st Class Lever

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6
Q

Output force is between fulcrum and input force

A

2nd Class Lever

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7
Q

Input force is between fulcrum and output force

A

3rd Class Lever

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8
Q

Grooved wheel with a rope, chain or cable running along groove

A

Pulley

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9
Q

Attached to output force something that doesn’t move

A

Fixed pulley

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10
Q

One end of the rope is fixed and the wheel is free to move

A

Moveable pulley

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11
Q

System with a combination of fixed and moveable pulleys

A

Compound pulley

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12
Q

Pulleys with grooved wheels designed to be fitted with a cable or rope and to turn freely within a block

A

Block and Tackle

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13
Q

Consists of an axel attached to center of larger wheel so that the wheel and axel rotate together

A

Wheel and Axel

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14
Q

Sloping surface, such as a ramp that reduces the amount of force required to do work.

A

Inclined Plane

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15
Q

An inclined plane wrapped in a spiral around a cylindrical post

A

Screw

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16
Q

Inclined plane with one or two sloping sides

A

Wedge

17
Q

Calculation for work

A

Work = Force x Distance

18
Q

How do machines make work easier?

A

By increasing the force that can be applied to an object

19
Q

What are the two forces that are applied when a machine does work?

A

Input and Output Force

20
Q

The force applied to machnes

A

Input Force

21
Q

The force applied by machine

A

Output Force

22
Q

What is the ratio of the output force to the input force.

A

Mechanical Advantage

23
Q

What is the formula for calculating mechanical advantage?

A

Mechanical Advantage = Output Force/Input Force

24
Q

Measures how much work put into a machine is changed into useful output work

A

Efficiency

25
Q

How can machines be made more efficient?

A

By reducing friction

Science (7 decks)

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