contestada

The equation gives the speed at impact, V metres per second, of an object dropped from a height of h metres. SHOW WORK From what height must an object be dropped to impact the ground at a speed of 18.6 m/s?

Respuesta :

Answer:

h = 17.65 m

Step-by-step explanation:

The given equation gives the speed at impact :

[tex]v=\sqrt{2gh}[/tex]

h is height form where the object is dropped

Put v = 18.6 m/s in the above equation.

[tex]h=\dfrac{v^2}{2g}\\\\h=\dfrac{(18.6)^2}{2\times 9.8}\\\\h=17.65\ m[/tex]

So, the object must be dropped from a height of 17.65 m.