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Mechanical Comprehension Test 2
97. In the diagram, Robert wants to lift a 450-poun block
using a lever. If the block is 3 feet from the pivot point
and Robert is 9 feet from the pivot point. How much
force must he apply to lift the block?
(A) 450 pounds
(B) 27 pounds
(C) 150 pounds
(D) 462 pounds
Water
98. Two men leave checkpoint 1 at the same time in the
same direction. One travels at 25 mph and the other at
Mercury 15 mph. How far apart are they after one hour?
(A) 5 miles
(B) 10 miles
(C) 25 miles
95. A lead plug is dropped into a beaker containing mercury (D) 40 miles
3
and water. Mercury is a liquid with a density of 8g/cm
3 16 feet
and water has a density of 1g/cm . If the plug has a
3
density of 10g/cm , where will it settle in the beaker?
(A) at the bottom of the beaker
(B) in the middle of the mercury layer
(C) in between the mercury and water layers 70 pounds
(D) on top of the water layer x feet 280 pounds
99. A 280-pound block is being pulled up an incline by a
pulley. The incline is 16 feet long. Neglecting friction,
if 70 pounds of force is necessary to move the block up
the incline, how tall is the incline?
120 pounds
(A) 4 feet
(B) 8 feet
(C) 16 feet
(D) 2.5 feet
100 pounds
96. Kemi is strong enough to pull a rope with 120 pounds of
force. Using the pulley system shown here, what is the
maximum weight she can lift?
(A) 480 pounds
(B) 360 pounds
(C) 240 pounds
(D) 120 pounds
450 pounds
100.Maria is strong enough to pull a rope with 100 pounds
of force. Using the pulley system shown here, what is
the maximum weight she can lift?
(A) 50 pounds (B) 100 pounds
3 feet 9 feet (C) 150 pounds (D) 200 pounds
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