Please enable JavaScript.
Coggle requires JavaScript to display documents.
Unit 5
Simple Machine, Pulley, Liver, inclined plane, A machine is…
-
-
Liver
-
A lever is a rod or a plank. When using a lever, a person transfers
a force from one end of the rod to the other. This is done by putting the
rod on a fulcrum, a point that does not move. One kind of lever is the
seesaw that you might see in the park or on a playground. Here the
fulcrum is in the middle. A seat is at each end of the plank, or lever. When
one end is pushed down, the weight on the other end is raised. When a
fulcrum is close to one end of a lever, very little force is needed at the
other end to move the object. Another common example of a lever is a
crowbar.
inclined plane
An inclined plane - a flat, slanted surface, such as a ramp- is
also a simple machine. Pushing an object up a ramp is easier than lifting
the object straight up. The longer the ramp, the easier it is to move the
object. This is because gravity pulls more strongly against something that
moves straight up than it does against something that moves on a slant.
Another example of an inclined plane is a road going up a hill. The steeper
the road is, the more difficult it is to walk up it.
-
-
more work than they can do by themselves. When you think of machine,
you probably think of something complex that has many parts. However,
-
-
of the most common simple machines are levers, pulleys, and inclined
-
-
-
-
are often attached at the high place, such as on a wood beam on a
-
object. When someone pulls on the other end, the wheel changes the
-
-
-
