Question

An object is dropped from a height of 25 meters. At what velocity will it hit the ground?
A. 7.0 meters/second B. 11 meters/second C. 22 meters/second D. 49 meters/second E. 70 meters/second

Answer 1

here we have to apply the formula of Torricelli, namely the requested velocity v, is given by the subsequent formula:
\[v = \sqrt {2 \times g \times h} \]
where g=9.81 m/sec^2

Answer 2

\[v = \sqrt {2 \times g \times h} = \sqrt {2 \times 9.81 \times 25} = ...?\]

Answer 3

so sqrt(2 X 9.8 X 25?

Answer 4

yes!

Answer 5

so 22.13 got it

Answer 6

that's right! Now you have to round off that value, so what do you get?

Answer 7

22 thanks alot

Answer 8

thanks!

Answer 9

no seriously thanks this was giving me trouble for a while and all the other places i checked gave me an incomplete equation to work with

Answer 10

ok! :)