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Science > Simple machines > Flashcards

Simple machines Flashcards

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1
Q

Pulley

A

A Pulley is a wheel, groove and rope that helps lift things

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2
Q

What happens if 2 pulleys are used?

A

The effort required is halved, this means the mechanical advantage is x2 times

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3
Q

What happens when 2 objects rub together?

A

There is a transfer of electrons from one object to the other. Meaning that one object looses its electrons and becomes positively charged and the other object gains electrons and becomes negatively charged.

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4
Q

Load of a lever

A

What is being lifted or moved

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5
Q

Examples of third-class lever

A
  • Broom
  • Tennis racquet
  • Tweezers
  • Fishing rod
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6
Q

Screw

A

a spiral thread around a rod made to hold objects together by going in them

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7
Q

What is the effort of a lever?

A

the force applied to overcome the load or get the job done

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8
Q

Examples of second class levers

A
  • wheelbarrow
  • nutcracker
  • paper guillotines
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9
Q

Examples of first-class levers

A
  • Pliers
  • Tin snips
  • Hedge cutters
  • Scissors
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10
Q

Taxonomist

A

a scientist who names and classifies things

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11
Q

What does Mr. N Greww stand for?

A 
M ovement
R eproduce
N utrition
G rowth
R esponse
E xchange gas
W ater
W aste
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12
Q

Wheel and axel

A

a type of lever that turns around it’s center

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13
Q

How does filtration work?

A

the filtrate passes through the filter and the residue is left behind in the filter.

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14
Q

How do we reduce unwanted friction?

A
  • streaming
  • lubricants
  • bearings / ball bearings
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15
Q

Simple machines

A

machines that reduce the amount of effort needed to do work.

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16
Q

Lever

A

a rigid rod or bar that is supported at a turning point called a fulcrum

17
Q

Tabular key

A

you read through the numbered items in order, Each item presents options, and as you go more information is revealed.

18
Q

How is the mechanical advantage calculated?

A

by dividing the size of the load by the size of the effort.

19
Q

When does a lever have a greater mechanical advantage?

A

when the distance from the fulcrum to the effort is longer than the distance of the fulcrum and the load

20
Q

Ramp

A

a ramp is an inclined plane used to move objects to higher surfaces.

Science (9 decks)

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