Answer:
The inicial height of the apple is 1.22 meters
Explanation:
Using the equation for conservarion of mechanical energy:
[tex]E=V+K=constant[/tex]
[tex]K_i=\frac{1}{2}mv_i^2[/tex] where v is the velocity
[tex]V=mgh[/tex]where h is the height
We equate the initial mechanical energy to the final:
Since [tex]v_0=0\ and h_f=0 [/tex]:
[tex]\frac{1}{2}mv_0^2+mgh_0= \frac{1}{2}mv_f^2+mgh_f\\gh_0= \frac{1}{2}v_f^2[/tex]
Solving for h:
[tex]h_0=\frac{4.9^2}{2g}= 1.22 m[/tex]
