The ideal mechanical advantage of a pulley system is equal to the
a) distance the load has to move
b) length of the rope
c) number of rope segments supporting the load
d) weight of the object being lifted
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Ответ:
The correct answer is "Number of rope segments supporting the load".
Explanation:
Mechanical advantage: It is defined as the ratio of the force produced by a machine to the force applied on the machine. The ideal mechanical advantage of a machines is mechanical advantage in the absence of friction.
The ideal mechanical advantage of a pulley system is equal to the number of rope segments which is supporting the load. More the rope segments, It is more helpful to do the lifting the work.
It means that less force is needed for this task to complete.
Therefore, the correct option is (C).
Ответ:
Reaction a: chemical, reaction b: nuclear
Explanation: