v = Vi + a t
Vi = 0
a = -10
so v = -10 t
0 = 1980 + 0 t - (1/2)(10)t^2
5 t^2 = 1980
t = 19.9 seconds
so v = -199 m/s
If there were no air resistance, with what
speed would drops hit the Earth if they fell
from a cloud 1980 m above the Earth’s sur-
face? The acceleration of gravity is 10 m/s2
1 answer
1 answer