Recent content by mcleanrs

Yeah, thanks for the help. It's hard to wander through the algebra forest looking for mistakes when you're not even sure your Physics is right ;)

Solution

Thanks for your help. I agree that they were ordered funny -- but by the time I realized that, I was feeling too lazy to redo my diagram! Anyway, I tweaked some things, and now my answer is even further off! I am being tested on this Monday, so I appreciate the help...got to figure these...

Homework Statement Question for search purposes: A crate is placed against a compressed spring on an incline. When the spring is released, the crate moves up the ramp and comes to a stop. How far was the spring compressed? Hint: The mass and the spring may not be in contact at the end.

Ok I was able to figure it out with that explanation. I'm not completely catching onto why it worked out that way, but I'm starting to get it. We have some more to do with this topic in the class, and I'm pretty sure it will click the next time it's explained. Thanks very much for your help.

Got it that time -- thank you very much. Never again will I be phased by such a problem!

2 really tricky ones for me on this homework assignment. I think I got the other one settled (Thanks to help here) -- now I just need to finish this last one. Homework Statement Two blocks sit on this frictionless table, but there is friction between the blocks. Static = .589 Kinetic =...

It's the direction of my F*sin (θ) arrow. That's increasing N, not decreasing. Going in for round 20.

Still not there. I know it's wrong because I'm given a range for N between 100 and 120, and I'm only getting 19. Again...not the foggiest idea what's wrong.

Ok -- I had an aha moment, and realized that F is the hypotenuse, not one of the sides. Let's take another crack at this.

Ok, thanks for the help. I'm going to work on it right now -- but if that's wrong than my trig is screwy. Can we take a side trip and figure out what misconception I'm running on? Here's the way I'm visualizing it: It seems (to me) like Fcos25 would give me F^2/X (Where X is the component of F...

I'm getting 2 equations and 2 unknowns. That's fine -- but solving for the unknown values does not give me even close to the right answers. When solved as displayed below, I get 21 for F (Should be between 80 and 120) and 50 for N (Should be between 100 and 120).

It's another block/incline question -- plus friction and a force This shouldn't be difficult. I've tinkered for a few hours, and I know I'm just missing some ticky thing about getting it setup right. I'm going to post the /whole/ question here, but really if somebody can just help me get...