Question

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

building 5meters High. Calculate the velocity which the object strikes the root​

Answer 1

19.8m/s or 14√2 m/s

Step-by-step 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:

`√(2*9.8m/s^2*20)`

`√(40*9.8m/s^2)`

`√(392m/s^2)`

`14√(2) m/s`

or
`19.8 m/s`