- #1

ponjavic

- 225

- 0

More vibrations woho.

The mass (top) can only move vertically. the two bars are weightless. The springs are bottom left = 100N/m bottom middle = 100 bottom right = 300.

They are symmetric away from the bars.

So what I did was make the two on the bottom left into one as 100+100 = 200.

Then they are now in parallel with the one above. 1/k=1/200+1/200 which yields the whole left side = 100.

Now replace the 2 ones left with (100+300)/2 and voila k for the whole system = 200. Probably wrong.

The mass of the block is 1 kg. wn=root(k/m) and I get 14 something I think it is hz?

Answer is 2.76 Hz, what do I need to do?

The mass (top) can only move vertically. the two bars are weightless. The springs are bottom left = 100N/m bottom middle = 100 bottom right = 300.

They are symmetric away from the bars.

So what I did was make the two on the bottom left into one as 100+100 = 200.

Then they are now in parallel with the one above. 1/k=1/200+1/200 which yields the whole left side = 100.

Now replace the 2 ones left with (100+300)/2 and voila k for the whole system = 200. Probably wrong.

The mass of the block is 1 kg. wn=root(k/m) and I get 14 something I think it is hz?

Answer is 2.76 Hz, what do I need to do?