2006-11-08 01:16:37 · 5 answers · asked by Daniel 1 in Science & Mathematics ➔ Physics
I do not think this man has 90 g brain in his head doing such a stupidity.
2006-11-08 01:57:28 · answer #1 · answered by Ormoz 3 · 0⤊ 0⤋
We use the kinematic equation
v^2-u^2=2gs
v=?
u=0
s=12m
g=9.81m/sec^2
v^2=2*9.81*12
=235.44
v=15.34m/sec
Please note weight has not
figured in this equation. Strictly
in vacuum a feather or a man
will land with same velocity in
exactly same time.
2006-11-08 09:21:25 · answer #2 · answered by openpsychy 6 · 0⤊ 0⤋
In the principle of conservation of energy, energy cannot be lost or created thus, kinetic energy will equal to gravitational potential energy.
KE=GPE
GPE=Mass x Gravitational pull x Height= (90)(10)(12)
=10800
KE= 0.5 x mass x velocity^2
10800= 0.5 x mass x velocity^2
21600= 90 x velocity^2
21600 / 90= velocity^2
240= velocity^2
(square root) 240 = velocity
= 15.49193
=15.5 meters per second
2006-11-08 09:50:40 · answer #3 · answered by commandar32 2 · 1⤊ 0⤋
Enough to make a big splash that will get everyone around him very wet!
2006-11-08 09:19:26 · answer #4 · answered by brucenjacobs 4 · 1⤊ 0⤋
15.4 m/s, as same like above solution
2006-11-08 09:23:29 · answer #5 · answered by Vinay 2 · 0⤊ 1⤋