Recent content by jcoolio12

so I went to my friend's house to work with him on the other one and after 2-3 hours of work, we finally got it. Thanks everyone. kinda crazy how I am having this much troubla and school hasnt even started yet...

UPDATE: i got the first one, just made an order of operations mistake. the second one is still getting me

did that and got -113.1264 + 47.136*t - 4.91*t^2 rearranged it in order of degree and then set up my quad. equation and got 0 in the numerator...this problem has pretty much been my morning. i need serious help right now

also is the 9.81 supposed to be negative since it's gravity?

wait so the time I thought the total time took 4.8s. like it took 4.8s from when he threw it for the sound to comeback. what I think you're saying is it took 4.8s to hit the water and 4.8s for the sound to come back...or did you accidentally not hit your shift key?

so basically for the second one, what I have so far is t + t'=4.8s no idea how to get either. I tried isolating them but you still have 2 unknown variables and I tried using some formulas to get t but still you have too many unknowns

ok so for the first one I didn't really know what I was doing so I just followed what the textbook did in an example: 155m= 0 + (5.5m/s)t + 1/2(-9.81m/s^2)t^2 and then the book somehow made that into a quadratic formula and so I did t= 5.5m/s +- (the square root of...) (5.5m/s)^2 -...

ok so here's one: A helicopter is ascending vertically with a speed of 5.50 m/s. At a height of 155 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter's.] and here's...

not sure. we have some summer work to do for it but I still haven't started it. here are some reviews from amazon: kinda pricey i think but I've never had to buy a textbook myself so not too sure if that's really expensive or not

my ap physics class uses the Giancoli 6th edition textbook

Alright, I turned in the project today. I colored it all beautifully and with my teacher's favorite colors so I hope it all goes well. I'll keep you posted!

@LCKurtz, thank you very much. I sat for like 30mins doing random formulas and half the time I'd just get circles and others just a bunch of scattered lines and stuff. but thanks, that's the one I'll use

Well I mean like I want something cool looking when u put it in the calculator

Hey guys. For my honors precal class, we just started learning about graphing polars and all that nonsense and we have a project due thursday where we have to make up out own polar formula and then draw the graph. I really want to do something cool but I can't think of anything. Please help!