Recent content by Dig

I have found the answer manually using the functions I created and my calculator. I would still like to know if there is an easier way to do it. I simply did the calculations and wrote down the results for each second up to 15. For the van's calculations, I added each result to 155meters which...

Thank you for your reply. Here are my attempts. Sues' Car: f(t) = v0(t) + (1/2)a(t)^2 For example: f(3) = 30(3) + (1/2)-2.00(3)^2 Which gives 81meters out of 225meters which is the total she traveled in 15 seconds. The Van: f(t) = vt For example: f(4) = 5.00(4) Which gives us 20meters...

Homework Statement 35. Speedy Sue, driving at 30.0 m/s, enters a one-lane tunnel. She then observes a slow‐moving van 155 m ahead traveling at 5.00 m/s. Sue applies her brakes but can accelerate only at ‐2.00m/s2 because the road is wet. Will there be a collision? State how you decide...

Thank you so much :).

Alright, if I multiply 60mi/h by .44, I receive 26.4m/s. I divide this by 68.6m/s^2 to get an answer of .385s? Both the numerator and denominator have 3 significant digits, so I stop at .385 correct? I see my mistake now. Thank you both for pointing that out to me.

Care to elaborate on where I went wrong and what I can do to correct my problem?

Homework Statement 22. The average person passes out an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate...

Noted! I appreciate your help a lot man. Any chance you could take a look at the second problem? I mostly need to understand the first part and the measurement and stuff. Any help is appreciated :).

I thought that s^-2 became 1/s^2.

I edited my message and did it your way at the bottom. Can you tell me if I applied that correctly? Also, why doesn't the pi count? I hate to be difficult, but it's just so confusing to see that 2pi out in front and it not mean anything lol.

Ok, I'm going to take a shot at what you left me with. If I multiply it by ^1/2, the m's cancel out, and I am left with (s^2)^1/2 which leaves me with s. So, that would make the original equation correct as s=s. Am I correct here? I understand what you meant by acceleration being ms^-2 now...

Thank you for your quick reply :). I was under the impression that g(acceleration) was equal to m(length) divided by s(time) squared. Am I wrong about this or is there some sort of exception I am not understanding here? Thanks.

Homework Statement Problem #1 http://img230.imageshack.us/img230/705/hwpicvf5.jpg Problem #2 http://img149.imageshack.us/img149/3196/hwpic2fb4.jpg Homework Equations The Attempt at a Solution Problem #1) I do not know where to proceed from here I have. T = 2pi * square...