vocabulary
A force applied to a simple machine
effort
Asimple machine made of a grooved wheel and rope
pulley
list the 6 simple machines
wedge~screw~pulley~inclined plane~wheel and axlel~lever
what is a wedge made of
2 or more inclined planes put together
when one gear turns another gear force is
transferred
a sloping surface used to move objects from one level to another
inclined plane
force exerted by the object you are trying to move
resistance
how do you know work is being done
a force is applied and the object moves
how do you calculate work
work=force x distance
all of the following simple machines change the direction of applied force EXCEPT the:
first class lever screw fixed pulley wheel and axle
wheel and axle
The tendency of an object to keep moving or to stay still
inertia
an inclined plane wrapped around a rod
screw
what kind of energy do objects that are moving have
kinetic energy
where do you place the fulcrum of a lever in order to lift a heavy object with the LEAST amount of effort
closer to the load
why does rolling an object on wheels require less force than dragging the object
it reduces the amount of friction
A rigid bar that pivots on a fulcrum
lever
a measure of how fast an object is moving
speed
why does a screw have many threads
so that you can drive it into wood easier and with less effort
doorknobs and faucets are examples of what kind of simple machines
wheel and axel
salad dressing is an example of what kind of mixture
heterogneous mixture
A unit foe measuring force
newton
a simple machine used to split or separate objects
wedge
what is friction
when 2 objects rub together, heat is produced, and the object either slows down or stops
pins, knives, and chisels are examples of what kind of simple machines
wedges
what is a heterogenous mixture
a mixture where the solute is not evenly mixed throughout