Question

Blocks C and D, weighing
4,000 newtons and 2,000 newtons,
respectively, rest on a horizontal
beam AB, as shown above. If the
reaction produced at B is twice as great
as the reaction produced at A, how far
from A will the weight of Block C
act?
(A) 2 m (C) 3.5 m
(B) 3 m (D) 4.0 m

Answer 1

A 10-pound object is suspended by a
string from an overhead support.
A horizontal force of 5.8 pounds is
applied on the object. The measure of
the angle which the string makes with
the horizontal is
(A) 30° (C) 60°
(B) 45° (D) 90°

Answer 2

A force of 60 newtons is used to
raise a 240-newton load using a
system of pulleys. The load covered a
distance of 1 m for every 5 m of rope
pulled through the system. The system
has an efficiency of
(A) 12% (C) 60%
(B) 48% (D) 80%

Answer 3

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Answer 4

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