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Biology, 11.06.2020 02:57 samueldfhung

How does a fixed pulley act as a machine? It changes the direction of the input force only.
It changes neither the size nor the direction of the input force.
It changes the direction and the size of the input force.
It changes the size of the input force only.

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How does a fixed pulley act as a machine? It changes the direction of the input force only.
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