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A lever with a mechanical adantage greater than 1 is used to ____________________.
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
x
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
A bar that is free to pivot about a fixed point is a _____________ .
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
When two or more simple machines work together, they are called a (n) ________________.
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
A machine that changes only the direction of a force has a mechanical advantage of ___.
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
Which one of the following is NOT an example of work being done?
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
As the speed of a fluid increases, ____________.
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
Three of the following simple machines are basically the same. The one that does NOT belong with the group is the ____________________.
1
a compound machine
pulling a sled across a field covered with snow
the pressure decreases
force
wedge
decrease force
lever
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