OHHH, I get it now. What I was missing was that you could use the equilibrium condition to simplify the differential equation. It would simplify the same whether vertical or on an incline, because the complicated trig part just cancels exactly.

Thanks, I've been wondering about that for a while.

## Search found 2 matches

- Mon Nov 19, 2018 7:44 pm
- Forum: Physics Help
- Topic: Given a cart and spring on incline, how do I find the period of oscillation?
- Replies:
**4** - Views:
**204**

- Mon Nov 19, 2018 6:58 pm
- Forum: Physics Help
- Topic: Given a cart and spring on incline, how do I find the period of oscillation?
- Replies:
**4** - Views:
**204**

### Re: Given a cart and spring on incline, how do I find the period of oscillation?

I don't understand your answer to the OP. For springs I can find the differential equation for a horizontal and vertical spring, but how can they be the same? The equations are m d^2x/dt^2 + k x = 0 m d^2x/dt^2 + k x + m g = 0 How can those give the same results whenthe equation is different? And al...