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OpenStudy (saifoo.khan):
An arrow is shot straight up into the air at a speed of 98 m/sec. What is the maximum height reached by the arrow? You may neglect air friction.
Select one:
a. 98 meters
b. 490 meters
c. 980 meters
d. 1,470 meters
OpenStudy (omnomnom):
Lol seriously?
OpenStudy (anonymous):
is this from the moon, pluto, saturn?
OpenStudy (saifoo.khan):
Mercury!
OpenStudy (omnomnom):
EARTH!
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OpenStudy (omnomnom):
ITS earth
OpenStudy (anonymous):
sorry, i don't have the gravitational constant for mercury... :(
OpenStudy (anonymous):
come to think of it, i don't have it for those planets/moon i mentioned...
OpenStudy (saifoo.khan):
v^2 = u^2 + 2as.
0^2 = 98^2 + 2(-9.81)s
OpenStudy (omnomnom):
LOL :D
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OpenStudy (saifoo.khan):
lol @dpaInc
OpenStudy (omnomnom):
and saifoo you just confused me further
OpenStudy (saifoo.khan):
Why so?
OpenStudy (saifoo.khan):
Where so?
OpenStudy (omnomnom):
idk the equation
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OpenStudy (saifoo.khan):
Don't you know the formulas? D:
OpenStudy (omnomnom):
i do but what the hell did you write?
OpenStudy (saifoo.khan):
What's so difficult in this?
v^2 = u^2 + 2as.
0^2 = 98^2 + 2(-9.81)s
OpenStudy (omnomnom):
okay \[V^2 = U^2 +2as\]
whats the U for?
OpenStudy (saifoo.khan):
v = final speed
u = initial speed
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OpenStudy (omnomnom):
OMG couldnt you write Vi ??? and Vf??
OpenStudy (omnomnom):
And let me guess the S is for time?
OpenStudy (saifoo.khan):
s = distance.
duhh.
OpenStudy (saifoo.khan):
And no. We study that here like that.
OpenStudy (omnomnom):
OMG use d for distance please
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OpenStudy (saifoo.khan):
\[\Large \color{red} {V_i = V_f + 2ad}\]
OpenStudy (omnomnom):
thank you
OpenStudy (saifoo.khan):
where are my $50?
OpenStudy (omnomnom):
i cant give it to you cuz you didnt answer the question :P
OpenStudy (saifoo.khan):
i did already.
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OpenStudy (omnomnom):
but whats the answer?
like is it a, b, c, d?
OpenStudy (saifoo.khan):
```
solve for d to find out the answer. :p
OpenStudy (omnomnom):
then make the equation less complicated
OpenStudy (saifoo.khan):
It's already less complicated.
OpenStudy (omnomnom):
NO it isnt you know where vi is?? Make d there and then i can answer it :D
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