Physics, 25.01.2020 07:31 guko

You find a featureless black slab. there are two arms marked in and out. you find that moving the in arm 20 inches causes the out arm to move 5 inches. you find that a 10 lb. pull on in lifts 30 lbs. on out. what is the ama? a. 1
b. 4
c. 3
d. 1/3

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