Question

A rock dropped from a height of 50 meters. How long does it take the rock to hit the ground?

Answer 1

if g=10m/s^2
time=sqrt(10) sec

Answer 2

\[t=\sqrt{2h/g}\]
so \[t=\sqrt{50*2/10}\]
\[t=\sqrt{10} \sec\]

Answer 3

ok?

Answer 4

is it the right answer?

Answer 5

ask if u have any doubt..

Answer 6

i can confirm that. basic formula i would have started from would be \[h=1/2*g*t^2\] which is easily transformed into chutzpahs first equation ;)

Answer 7

ty