Simple machines make work easier for the person doing the work. Machines help us do work by multiplying the force that we apply. A wedge is a simple machine that multiplies applied force. Machines also help us do work by changing the direction of
the force that we apply. A lever is an example of a simple machine that can help us multiply force and may change direction
of a force.
Which is the BEST concluding sentence for this paragraph?
A)
A wedge can be used as a doorstop to keep a door open or closed.
B)
C)
A lever can be used to pry open doors in an emergency or to get nails out
of a board.
The wedge and the lever are two common simple machines people use to
do work everyday.
There are four more basic simple machines besides the wedge and the
lever.
D)