YumYum247
  • YumYum247
elp plez!!!
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
YumYum247
  • YumYum247
YumYum247
  • YumYum247
@arindameducationusc
YumYum247
  • YumYum247
why am i getting -14.3m at the maximum height??????????

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More answers

YumYum247
  • YumYum247
as*
arindameducationusc
  • arindameducationusc
please upload nicely. 2.3 what???
YumYum247
  • YumYum247
m/sec
YumYum247
  • YumYum247
that's the initial launch velocity....2.3m/sec
arindameducationusc
  • arindameducationusc
hmmm
arindameducationusc
  • arindameducationusc
use H=u^2sin^2theta/2g where u=2.3 g=9.8 and theta = 78
YumYum247
  • YumYum247
nope i wasa still getting some negative answer -_-
arindameducationusc
  • arindameducationusc
2.3^2=5.29 sin78=0.51 (use calculator) 5.29*(0.51)^2/2*9.8 =1.37/19.6
YumYum247
  • YumYum247
why didn't you squared the sin?
YumYum247
  • YumYum247
|dw:1440300973805:dw|
arindameducationusc
  • arindameducationusc
I squared (I skipped one step) Please see carefully
YumYum247
  • YumYum247
and why isn't gravity = -9.8m/Sec^2 here???? O_o :) :D
arindameducationusc
  • arindameducationusc
No no its \[H=\frac{ u ^{2}\sin ^{2}\theta }{ 2g }\]
YumYum247
  • YumYum247
so 9.8 as g?
arindameducationusc
  • arindameducationusc
why are you taking -9.8 ? g=9.8 We take minus because of direction sometimes!
arindameducationusc
  • arindameducationusc
yes yes 9.8 =g
YumYum247
  • YumYum247
cuz when an object goes up, the gravity is always -9.8....
YumYum247
  • YumYum247
but when the object goes down, then it's 9.8...
arindameducationusc
  • arindameducationusc
not necessary. The direction totally depends on you... and ya H will always be +ve because of height
YumYum247
  • YumYum247
ok let me calculate this now.....
arindameducationusc
  • arindameducationusc
ok
YumYum247
  • YumYum247
|dw:1440301420914:dw|
arindameducationusc
  • arindameducationusc
yes
arindameducationusc
  • arindameducationusc
Good
YumYum247
  • YumYum247
|dw:1440301591574:dw|
YumYum247
  • YumYum247
does that make any sense, cuz something that launches at 2.4m/s at an angle of 78deg has a maximum altitude of 0.24m??????
YumYum247
  • YumYum247
sorry 2.3m/sec
arindameducationusc
  • arindameducationusc
yes yes good
arindameducationusc
  • arindameducationusc
see the highest Maximum height is for angle 45 degrees, 78 will go very low
arindameducationusc
  • arindameducationusc
angle 60 and angle 30 go same maximum height angle 78 and angle 12 go same max height
YumYum247
  • YumYum247
yes i understand that...any degree higher than 45 will increase the vertical displacement of the object while decreasing the horizontal displacement.....
YumYum247
  • YumYum247
cuz after the 45 angle, the vertical comp starts to increase while the hori comp starts to decrease...
YumYum247
  • YumYum247
but styll 0.24m seems small..but i guess it's ok....
arindameducationusc
  • arindameducationusc
yup
YumYum247
  • YumYum247
hey can you check one more question...i've already done it, just check it real quick!!!
arindameducationusc
  • arindameducationusc
okay will try, dont forget to medal and fan @YumYum247

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