# Homework Help: Challenging problem for SHM.

1. Sep 9, 2014

### PhysicsKid0123

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Null

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Last edited: Sep 10, 2014
2. Sep 9, 2014

### PhysicsKid0123

Disregard the tangent stuff on the right I tried doing something else...

3. Sep 9, 2014

### PhysicsKid0123

Any clues?

4. Sep 10, 2014

### ehild

I would be able to read your attempt if it was typed in.
Such problems are solved by eliminating the unknown amplitude by using sin2(ωt)+cos2(ωt)=1

ehild

5. Sep 10, 2014

### PhysicsKid0123

Yes,.

Last edited: Sep 10, 2014
6. Sep 10, 2014

### PhysicsKid0123

By the way, you weren't to see my pictures? Mhm.

7. Sep 10, 2014

### ehild

You are supposed to type in your work. I can not decipher what you did from the pictures.

Do the same you did when eliminating the amplitude, but eliminate omega this time.

ehild.

8. Sep 10, 2014

### ehild

It is x=Asin(wt) and dx/dt= Aw cos (wt). The displacements and speeds are given at two different times.

a=A sin(wt1) u/w=Acos(wt1) -->a2+( u/w)2=A2

b=Asin(wt2) v/w=A cos(wt2) -->b2+( v/w)2=A2

Eliminate the angular frequency this time.

ehild.

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