Question

A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second?

A.5.1 meters
B.9.8 meters
C.25 meters
D.15 meters

Answer 1

I believe that its D. 15 Meters

Step-by-step explanation:

Answer 2

Answer:B

Step-by-step explanation:

Initial velocity, u=0m/s

Distance,s=20m

a=+g=9.8m/s*s

Using v*v=u*u+2gs

v*v=0+2*9.8*20

v*v=392

v=19.8

When s=20m, v = 19.8m/s

Therefore when v = 10m/s, s= 10*20/19.8

s =10.1m