Show:
rollers and wheels
pulleys
machines
gears
glossary
100
what was made first rollers or wheels?when
rollers were made first they were made 6000 years ago
100
what are the 3 types of pulleys
fixed, moveable, block and tackle
100
machines are oiled so........
there will be less friction
100
how do you make gears turn the same direction?
by having two gears the same size
100
what is another name for teeth
cogs
200
what were mans 1 engine
animals
200
which pulley is most convenient
fixed
200
what do machines do
work
200
the simplest and most common gears is....
spur gears
200
what does block and tackle mean
a unit made up of several pulleys linked together by ropes
300
what is easier to push
wheels!
300
what are some stuff that uses pulleys
curtains, flag, crane
300
what is force
a push or a pull
300
we say that the......of the gears is 2:1
ratio
300
what does fulcrum mean
the supporting point of a lever; also called a pivot
400
wheels are were used how many years ago
3000 years ago
400
what is a pulley?
a pulley is a wheel with a groove in the rim
400
what are some machines
clock, computer ,smartboard
400
is larger gears faster or is smaller gears
smaller gears
400
what does mesh mean
to smoothly interlock the teeth of two or more gear wheels
500
a wheel is a slice of a.......
roller
500
were is the pulley in a flag
the rope
500
machines do.....
work for us
500
what does idler mean
a gear that transmit force and motion from one gear to another
500
what does shaft mean
another term for axle