Agreyhound's velocity changes from rest to 19 m/s in 2 seconds. what is the greyhound's average acceleration?

a)2 m/s2

b)9.5 m/s2

c)19 m/s

d)38 m/s

i believe the answer is a

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

probably not if net force is zero