How many hits in volleyball are each team allowed to have on their side of the net before returning the ball to the other team?

a. 2

b. 3

c. 4

d. 5

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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