3551

Physics Dimensions Level: University

Equation of Motion
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. 2.0 m/ s2 downward
b. 2.0 m/s2  upward
c. 5.3 m/s2 downward
d. 5.3 m/ s2 upward
e. 2.7 m/ s2 downward