A girl throws a rock horizontally at 10 m/s from the top of a building, 22 m above street level. Assuming free fall conditions and the ground is horizontal, how far horizontally from the base of the building will the rock hit the ground?

Respuesta :

Answer:21.18 m

Explanation:

Given

initial speed u=10 m/s

height of building h=22 m

time taken to complete 22 m

[tex]h=ut+\frac{1}{2}at^2[/tex]

initial vertical velocity =0

[tex]22=\frac{1}{2}gt^2[/tex]

[tex]t=\sqrt{\frac{22\times 2}{g}}[/tex]

[tex]t=2.11 s[/tex]

Horizontal Distance moved

[tex]R=u_x\times t[/tex]

[tex]R=10\times 2.11[/tex]

[tex]R=21.18 m[/tex]