Page 392 - GMAT 2017b_Neatb

Mechanical Comprehension Test 2

32. A 360-pound block is being pulled up an incline by a
pulley. The incline rises 10 feet. Neglecting friction, if
120 pounds of force is necessary to move the block up
the incline, how long is the incline?
(A) 30 feet
(B) 360 feet
(C) 20 feet
(D) 60 feet

29. To change a tire, a person is able to take advantage of the
mechanical advantage of a jack to lift a car. Each
1
complete turn of the screw raises the inch. If the
4
handle travels 3 feet per revolution, what is the
mechanical advantage of the jack?
(A) 12
(B) 36
(C) 14
(D) 144
33. A spring has a force constant of 3 pounds per inch.
How much force is required to move the spring 1 foot?
(A) 3 pounds
(B) 12 pounds
(C) 24 pounds
(D) 36 pounds

A
30. Bryan is strong enough to pull a rope with 150 pounds of B
force. Using the puller system shown here, what is the
maximum weight he can lift?
(A) 50 pounds
(B) 300 pounds
(C) 450 pounds
(D) 600 pounds 34. Pulley A is three times the diameter pulley B. If pulley
A rotates at 45 revolutions per minute (rpm), how fast
31. A wheelbarrow is loaded with 80 pounds of dirt. must pulley B rotate?
However, it can be lifted with only 20 pounds of force. (A) 15 rpm
What is the mechanical advantage of the wheelbarrow? (B) 45 rpm
(A) 1 (C) 90 rpm
(B) 2 (D) 135 rpm
(C) 3
(D) 4 35. A block of wood rests on a level surface. What
mechanical principle makes it more difficult to push
120 pounds x feet
this block sideways if the surface is made of sandpaper
than if it is made of glass?
(A) centrifugal force
(B) gravity
(C) wind resistance
(D) friction
360 pounds

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