121.
Refer to figure 1F.
If a person
exerts at point B a pull of 60
pounds on the claw hammer shown,
what is the resistance that the
nail offers?
1.
60 lb
2.
120 lb
3.
480 lb
4.
730 lb
122.
Which of the following definitions
describes the mechanical advantage
of
1.
2.
3.
4.
the lever?
Effort that must be applied to
overcome the resistance of an
object divided by the
resistance of the object
Amount of work obtained from
the effort applied
Gain in power obtained by the
use of the lever
Resistance offered by an object
divided by the effort which
must be applied to overcome
this resistance
123.
The mechanical advantage of levers
can be determined by dividing the
length of the effort arm by the
1.
distance between the load and
the point where effort is
applied
2.
distance between the fulcrum
and the point where effort is
applied
3.
distance between the load and
the fulcrum
4.
amount of resistance offered by
the object
124.
The mechanical advantage of the
lever in figure 1G is
1.
onefifth
2.
one-fourth
3.
four
4.
five
125.
The mechanical advantage of the
lever in figure 1H is
1.
one
2.
two
3.
onehalf
4.
onefourth
4