Respuesta :

Kyleyeah

Answer:

140 m/s

Step-by-step explanation:

irspow

Answer:

Step-by-step explanation:

Final kinetic energy is equal to gravitational potential energy

KE=PE

(mv^2)/2=mgh

v^2=2gh

Given h=7m and g=9.8m/s^2

v^2=2(9.8)7

v^2=137.2 m^2\s^2

v=11.7 m/s

They rounded to 11.8 m/s for whatever reason :)