1. A woman draws water
fixed pulley. The mass of bucket and water
together is 6 kg. The force applied by the woman
is 70 N. Calculate the mechanical advantage.
(Take g = 10 m s-2)
Ans. 0-857
2. A fixed pulley is driven by a 100 kg mass falling at
a rate of 8.0 m in 4.0 s. It lifts a load of 75-0 kgf.
Calculate :
(a) the power input to the pulley taking the force of
gravity on 1 kg as 10 N.
(b) the efficiency of the pulley, and
(c) the height to which the load is raised in 4.0 s.
Ans. (a) 2000 W, (b) 0.75, (c) 8-0 m
3. A single fixed pulley and a movable pulley both are
separately used to lift a load of 50 kgf to the
height. Compare the effe
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Answer:
Answer. The force applied by the women is = 70 N The mass of bucket and water together is = 6 kg Total load = 6 × 10 = 60 N Mechanical advantage M.A = Load/Effort = 60/70 = 0.857 answer.. Hope u understand NOW!
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