Page 400 - GMAT 2017b_Neatb

Mechanical Comprehension Test 2

91. In the diagram, Daniel wants to lift a 225-pound block
using a lever. If the block is 4 feet from the pivot point
and Daniel is 6 feet beyond that, how much force must
he apply to lift the block?
(A) 100 pounds
B

(B) 24pounds
A
(C) 90 pounds
(D) 225 pounds
A B C
87. Pulley B has four times the circumference of pulley A. If
pulley A rotates at 60 revolutions per minute (rpm), how
fast must pulley B rotate?
(A) 15 rpm
(B) 30 rpm
(C) 60 rpm
(D) 240 rpm
88. An object is most likely to slide the farthest on which
surface? 92. Three identical objects are placed on a table in
(A) ice different orientations. Which orientation is most
(B) wood stable?
(C) dirt (A) orientation A
(D) rubber (B) orientation B
(C) orientation C
89. A single speed bicycle has a front chain ring with 54 (D) A and C are equally the most stable
teeth. The back gear has 12 teeth. If the bicycle is
pedaled at 90 rpm, how fast does the rear wheel rotate? 3
93. A rock is shown to have a density of 10g/cm . It is then
(A) 90 rpm
cut precisely in half. What is the density of the two
(B) 180 rpm
(C) 405 rpm pieces?
(D) 500 rpm (A) 5g/cm 3
3
(B) 8g/cm
90. A balloon is filled with helium. It is then taken to a
special room where the air pressure is decreased. What (C) 10g/cm 3
will happen to the balloon? 3
(A) Its size will increase. (D) 20g/cm
(B) Its size will decrease
(C) Its size will stay the same.
(D) It will begin to sink. 27 feet

3 feet
4 feet 360 pounds
6 feet

225 pounds
94. A 360-pound block is being pulled up an incline by a
pulley. The incline is 27 feet long and rises 3 feet.
Neglecting friction, how much force is necessary to
move the block up the incline?
(A) 81 pounds
(B) 360 pounds
(C) 387 pounds
(D) 40 pounds

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