Relative Motion doubt

Why am I getting different answers in both the cases?
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17 Replies
iTeachChem Helper
@Gyro Gearloose
iTeachChem Helper
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Percy
PercyOP6mo ago
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Percy
PercyOP6mo ago
correct ans is 2secs btw
727
7276mo ago
box is accelerated in x axis by g sin(theta) so it would be 8=ut+at^2/2
Percy
PercyOP6mo ago
If I consider this then the answer I am getting is t = 0.54
727
7276mo ago
hmm ping me when someone answers please
Percy
PercyOP6mo ago
okay
Sephrina
Sephrina6mo ago
can we solved this using distance travelled ?
Gamertug
Gamertug6mo ago
even though i did not get the right answer , the distance wont be 8 it would be 10root2 its travelling across the cube
Sephrina
Sephrina6mo ago
tht is vector distance i got tht too @Olaf Parasar isse solve karo
Percy
PercyOP6mo ago
I didn't take the distance as 8...I took the displacement in x direction as 8
Gamertug
Gamertug6mo ago
why only x, this is 3d , v is in both x and z direction then u should have taken Vx , not V
Percy
PercyOP6mo ago
yesss you are right So my main question was why I get the correct answer when I consider displacement in the y-direction, but a wrong one when I look at the x-direction. This explanation clears it up—thanks!
Sephrina
Sephrina6mo ago
if solved please close the doubt
Percy
PercyOP6mo ago
+solved @Sephrina
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