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simple machines (pulley (what are pulleys, pulleys make work much faster,…
simple machines
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inclined plane
inclined planes are side ways. it can help carry one thing to on other place that is high.a inclined plane can be ramps or stairs.
when do we use stairs and when do we use ramps? we use stairs when its steep or then we will fall down.
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when you walk on a inclined plane it takes much longer then jumping but when you jump it takes more effort
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lever
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what are levers ? for egsample a seesaw has a lever because the bar of the seesaw is the lever and the bottom of the seesaw is the fulcrum
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wheel and axle
is a wheel and axle better than a roller? or is a roller better than a wheel and axle?
a wheel and axle is much better than a roller for a car because if there were rollers then you do get lots of trees and get trees that are in the front to the back again and again
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