Jules R. answered • 11d

Former Engineer Turned Artist Turned Teacher

This gets tricky if you don't have the time given, but you do have the final velocity and you have the gravitational constant of g = 9.8 m/s^{2} and from these you can get what you need.

Freefall equation:

H = 1/2 gt^{2}

But you don't have t. Here's how to derive it: if v_{final} = gt, then t = v_{final }/ g

So substitute for t and plug and chug.

H = 1/2 g (v_{final}/g)^{2} = 1/2 (9.8) (30/9.8)^{2} = 15 m tall building

Hope that helps.

Arturo O.

The final equation for H gives 45.92 m.11d