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We have .... in clocks and wind-up toys.
 
gears
 
chains
 
levers
 
bateries
What are the simple machines in scissors?
 
Levers and Wedges.
 
Levers and Pulley
 
Wedge and Screw
 
Wedge and Incline plane
What moves in a straight line when a cog turns?
 
Rack
 
Gear
 
Chain
 
Pulley
If your TV breaks, you should …
 
try to fixed
 
throw it out
 
give it to your little brother
 
buy a new one immediately
Before cleaning a toaster, you should … .
 
unplug it
 
get it wet
 
empty it
 
have some toast
The cogs on a bicycle … .
 
make the back wheel spin and they are on axles
 
are on axles
 
make the back wheel spin
Which type of mechanism are pedals on a bicycle?
 
Cranks
 
Gears
 
Cog and chain
 
Cog and Rank
When we turn one cog it transmits movement to the other cog thanks to the chain. Both cogs move in..........direction
 
The Same
 
Diferent
Several cogs that are connected.
Gears
It moves in a straight line when a cog turns:
A Rack
It transmits the movement from one cog to another
A chain
Several cogs that are connected.
Gears
Which type of mechanism do we use in a corkscrew and sliding doors?
A rack and cog.
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