Q4 (a) 600
(c) 1500
oetween tne two forces is
(b) 1200
(d) 900
4. A weightless ladder, 20 ft long,
rests against a fric-
tionless wall at an angle of 600 with the horizontal.
A 150-pound man is 4 ft from the top of the ladder.
A horizontal force is needed to prevent it from slipping.
Choose the correct magnitude:
(a) 175 1b
(c) 701b
(b) 1001b
(d) 1501b
5.
A mass M is suspended by a rope from a rigid suppo
is tied
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