Levers
Levers are a type of _____ machine.
Simple
The _____ passes through the centre of the wheel.
axle
An _____ _____ is a ramp used to lift and lower heavy objects.
inclined plane
What did Archimedes Invent?
Archimedes screw
What is needed by all machines to work?
Energy
The object we need to move exerts a force. It is called the _____.
A pulley uses which 2 things?
1. Wheel and axle
2. Rope
How many parts does an inclined plane have?
1
Who made the pedal bicycle
Kirkpatrick Macmillan
This is used to pull a bucket up from a well.
A pulley
Name 3 examples of items that uses lever.
Scissors, bottle opener, ice tongs, pliers, nutcracker, wheelbarrow, tweezers, hammer, stapler
There's a _____ in the outside of the wheel of pulleys.
Groove
This is an inclined plane wrapped around a pole.
What did Mary Anderson invent?
Windscreen wiper
This combines several simple machines
A complex machine
The person using the lever applies a force which is called the _____.
Effort
We use a pulley to make it easier to _____ or _____ heavy objects.
lift; lower
This is 2 inclined planes back to back.
A wedge
Who invented the first powered airplane?
The Wright brothers
This is a strong, thick string made of fibres twisted together.
A lever is a rigid bar with a _____ _____.
pivot point
Give 3 example of pulleys that we use
Well, flagpole, bicycle, blinds, curtains, crane truck, zipline
Which is easier?
A. To push something up a shorter ramp
B. To push something up a longer ramp
B.
Who made the personal computer
Steve Wozniak
A point where the lever turns
Pivot point