1-47.
What maximum load can you lift by
applying a 50pound force to the
handle of an 18inch crank that is
connected to a 9inch-diameter drum
of a hand winch?
1.
50 lb
2.
100 lb
3.
150 lb
4.
200 lb
148.
The moment resulting from a force
acting on a wheel and axle is equal
to the
1.
2.
3.
4.
amount of force required to
produce equilibrium in a wheel
and axle
ratio of the force to the
distance from the center of
rotation
distance from the point where
the force is applied to the
center of the axle
product of the amount of the
force and the distance of the
force from the center of
rotation
1-49.
The clockwise moment of force about
the fulcrum of figure 1N is
1.
4 2/3 ft-lb
2.
6 ft-lb
3.
25 ft-lb
4.
150 ft-lb
1-50.
If in the lever shown in figure 1N
both the amount of force and the
distance between the fulcrum and
the point where force is applied
are doubled, the torque will be
1.
1/2 as great as before the
changes were made
2.
2 times as great as before the
changes were made
3.
4 times as great as before the
changes were made
4.
8 times as great as before the
changes were made
1-51.
What would be the resultant torque
in figure 1P?
1.
Clockwise torque of 10 ftlb
2.
Clockwise torque of 14 ft-lb
3.
Counterclockwise torque of 10
ft-lb
4.
Counterclockwise torque of 14
ft-lb
1-52.
What will happen to a machine when
clockwise and counterclockwise
moments of force are in balance?
1.
The machine will break down
2.
The machine will either remain
at rest or move at a steady
speed
3.
The machine will move at an
increasing speed
4.
The machine will move at a
decreasing speed
8