# Convinced I'm hopeless at maths at this point :)

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#1
If anyone would mind helping:

Here is the question:

https://hosting.photobucket.com/imag..._23.43.57.png?

I'm confused on what's happening with the times; for the second particle is the time t + 1 or t -1? Also, where would I go from here?
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#2
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7 months ago
#3
(Original post by NaBrO)
If anyone would mind helping:

Here is the question:

https://hosting.photobucket.com/imag..._23.43.57.png?

I'm confused on what's happening with the times; for the second particle is the time t 1 or t -1? Also, where would I go from here?
Write your equations for the second particle with t' instead of t. What is the value of t' when t=1? Can you write t' in terms of t?
Last edited by RogerOxon; 7 months ago
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7 months ago
#4
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7 months ago
#5
(Original post by NaBrO)
If anyone would mind helping:

Here is the question:

https://hosting.photobucket.com/imag..._23.43.57.png?

I'm confused on what's happening with the times; for the second particle is the time t + 1 or t -1? Also, where would I go from here?
Since the second particle starts 1 s later, but arrives the same time, you can sub t -1 into the equation for second particle.
both particle travel the same distance, so use s = (u + v)t/2, substituting values for each particle and equating each expression, since s is the same.
Solve for t.
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#6
(Original post by RogerOxon)
Write your equations for the second particle with t' instead of t. What is the value of t' when t=1? Can you write t' in terms of t?
So I've done this... not really sure if it's correct.

First particle: s = 1/2 (u + v) t
s = 4t
Second: s = 1/2 (u + v) t
s = 6t'

6t' = 4t ...?
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7 months ago
#7
(Original post by NaBrO)
So I've done this... not really sure if it's correct.

First particle: s = 1/2 (u + v) t
s = 4t
Second: s = 1/2 (u + v) t
s = 6t'

6t' = 4t ...?
nearly there
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7 months ago
#8
t' = t - 1
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#9
(Original post by Hallouminatus)
t' = t - 1
6t - 6 = 4t
t = 4
Let's hope that smiley face isn't in vain lol
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7 months ago
#10
(Original post by NaBrO)
6t - 6 = 4t
t = 4
Let's hope that smiley face isn't in vain lol
6t - 6 = 4t is good, but...
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#11
(Original post by Hallouminatus)
6t - 6 = 4t is good, but...
t = 3.
what is my problem : )
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