physics

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An elevator is moving upward with a speed of 11 m/s. Three seconds later, the elevator is still moving upward, but its speed has been reduced to 5.0 m/s. What is the average acceleration of the elevator during the 3.0 s interval?
a.5.3 m/s2, upward
b.2.0 m/s2, upward
c.5.3 m/s2, downward
d.2.7 m/s2, downward
e.2.0 m/s2, downward

  • physics -

    its e.2.0 m/s2, downward

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