Alex9089435028
28.01.2021 •
Physics
Someone pushes on a rock and measures the net force acting on it is 147 N and acceleration to be 7.5m/s2.What is the weight of the rock?
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Ответ:
Ответ:
A. two pulleys.
Explanation:
While using only one pulley requires you to use only half the force it would take to lift a load by hand, a fixed pulley combined in a system with a movable pulley, essentially doubles the force applied to lift or move the object.