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A rock (weight 25 N) is suspended from a cable attached to the ceiling of a moving elevator. If the
tension in the cable is 20N,
what is the acceleration of the elevator ?
a.
2 m/s2 downward
stion
b. 2 m/s2 upward
C.
the elevator is moving at constant speed.
O d.
0.2 m/s2 downward
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