Question

An object falls freely from a height of 25 meters onto the root of

Answer 1

Answer:

19.8m/s or 14√2 m/s

Explanation:

To find how fast something is going when it strikes the roof, we can use the equation √(2*g*height) where g=9.8 m/s^2 and the height is 20 meters as 25-5=20.

Substituting in we get:

$\sqrt{2*9.8m/s^2*20}$

$\sqrt{40*9.8m/s^2}$

$\sqrt{392m/s^2}$

$14\sqrt{2} m/s$

or$19.8 m/s$