Recent content by LilRubyKinz

I know Young’s Modulus, but mass is not a variable involved in the formula?

No that’s the complete statement. The rest of the page is something separate (different assignment). I’d like to attempt it... but I don’t know what to attempt!

While I’m here - Young’s modulus is also on this test. Does anyone have an idea of what is being asked of this question? Where does mass apply?

Okay, I was absent for this lesson. So mind any inaccuracies. I have: v1 + v1’ = v2 + v2’ m1v1 + m2v2 =m1v1’ + m2v2’ v1’ = [(m1 - m2)/(m1 + m2)]v1 v2’ = [(2m1)/(m1 + m2)]v1 One and two are for elastic systems only I believe? The last two equations don’t involve v2 so I don’t know that...

My teacher wants me to know how to solve for missing values in a 1D collision when v2 does NOT equal 0. Could someone do me a huge favour and make me a practice question to solve for a missing value when v2 does not equal 0? Or even point one out to me online? And then let me try it out and...

Okay thank you!

Okay, getting a little bit of mixed messages here... But I think 20.5 makes the most sense to me. Thank you very much! I will fix significant digits now.

Sorry, swap kg and m there. Copied it wrong. But the book shows Lm and Ls reversed from what I have here... So 20.5 should be the answer? Or 2?

So I am supposed to multiply there, not divide? Making the new length 0.312? Making the answer 20.5? Or is density supposed to be unchanged?? My brain hurts.

Okay thank you! Now one more thing I don't understand. mm = 2 / 0.312 = 6.4 m Lm = 1 / 0.312 = 3.2 kg 6.4 / 3.2(1)(1) = 2 Why am I still getting 2 as the answer? Does the density not change?

So does that mean I'm right? Sorry I'm not great at this!

Yes?

Is only one side length affected by length contraction or all three?

Okay here's the problem. The square root of 1 - (0.95c)^2 / c^2 should be 0.312. I calculated this wrong. I'm going to try again with this new value; I'll let you know what I get

I confuse easily, sorry. I thought this meant not to use it. Can you please walk me through the correct process of calculating the new mass and lengths?