Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
|
|
|
1.
|
A slanted
surface used to raise an object is a(n) ____. a. | efficiency board | c. | inclined plane | b. | effort
ramp | d. | screw | | | | |
|
|
|
2.
|
A device
that does work with only one movement and changes the size or direction of a force is a(n)
____. a. | compound
machine | c. | screw | b. | effort machine | d. | simple machine | | | | |
|
|
|
3.
|
The rate at
which work is done is called ____. a. | efficiency | c. | force | b. | effort time | d. | power | | | | |
|
|
|
4.
|
The amount
by which a machine multiplies an effort force is called the ____. a. | efficiency
factor | c. | mechanical
advantage | b. | fulcrum | d. | resistance force | | | | |
|
|
|
5.
|
A machine
that changes only the direction of a force has a mechanical advantage of ____.
|
|
|
6.
|
A winding
mountain road is an example of a(n) ____. a. | block and tackle | c. | inclined plane | b. | lever | d. | wheel and
axle | | | | |
|
|
|
7.
|
A lever with
a mechanical advantage greater than 1 is used to ____. a. | change
direction | c. | increase
force | b. | increase distance | d. | increase force and change direction | | | | |
|
|
|
8.
|
Three of the
following simple machines are basically the same. The one that does NOT belong with the group is the
____. a. | lever | c. | wedge | b. | pulley | d. | wheel and axle | | | | |
|