Superposition of two simple harmonic motion

AI Thread Summary
The discussion revolves around summing two simple harmonic motions represented by the equations cos(t+5325) and 1.5 cos(t+5325). The correct approach to sum these equations is to combine the coefficients, resulting in 2.5 cos(t+5325). However, when the second term changes to 1.5 cos(t-5325), the equations cannot be directly combined due to differing arguments, and thus the sum does not simplify to a single cosine function. The final clarification emphasizes that the two terms must have the same argument to be summed directly. Understanding the conditions for combining harmonic motions is essential for solving such problems.
Krokodrile
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Homework Statement
find the sum of cos (t+5325) + 1.5 cos (t+5325)
Relevant Equations
X1 `+ X2
Hey! I am stuck in this problem, i don't know how to sum this ecuations.

I remember that its possible because the direction is the same

So, i try to sum like this:

cos (t+5325)
+
1.5 cos (t+5325)

=1.5 cos (t+5325) I don't know if i fine. I thanks your help, please ;)
 
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Krokodrile said:
Homework Statement:: find the sum of cos (t+5325) + 1.5 cos (t+5325)
Relevant Equations:: X1 `+ X2

Hey! I am stuck in this problem, i don't know how to sum this ecuations.

I remember that its possible because the direction is the same

So, i try to sum like this:

cos (t+5325)
+
1.5 cos (t+5325)

=1.5 cos (t+5325) I don't know if i fine. I thanks your help, please ;)
Maybe there is a typo in your post, but otherwise both terms are cos() with the same arguments. So what is 1+1.5?
 
berkeman said:
Maybe there is a typo in your post, but otherwise both terms are cos() with the same arguments. So what is 1+1.5?
oh, yes. I lose my mind for a second.

So, the answer would be:

2.5 cos (t+5325) ?
 
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Likes Delta2 and berkeman
berkeman said:
Maybe there is a typo in your post, but otherwise both terms are cos() with the same arguments. So what is 1+1.5?
And...only a last question: in the case that 5325 have a negative sign like:

cos (t+5325)
+
1.5 cos (t-5325)

=2.5 cos (t) ??

thank you so much for you help
 
Krokodrile said:
And...only a last question: in the case that 5325 have a negative sign like:

cos (t+5325)
+
1.5 cos (t-5325)

=2.5 cos (t) ??

thank you so much for you help
No.
 
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