Recent content by einsteinphysi

Solved the 1 I just posted! Yes! Now I just need that dreaded "other question"

Here's another: "Figure 2-28 shows a red car and a green car that move toward each other. Figure 2-29 is a graph of their motion, showing the positions xg0 = 270 m and xr0 = -35 m at time t = 0. The green car has a constant speed of -20 m/s and the red car begins from rest. What is the...

Δv/Δt - Δ2v/Δ2t? No, that's not right.

I don't get it :( Another hint?

I have an hour left till this is do by e-mail (don't worry it's just homework, not a test or anything). I'll try what you said.

Woo! Got it! So only need help with the "other question." Thanks.

Homework Statement I have three questions total (did five already). I don't want the straight-answers but I need help working them through since I want to do them myself. Here's the first one: ---To set a speed record in a measured (straight-line) distance d, a race car must be driven first...

Got it!

Now what?

HAHA, I see a mistake (when I took the derivative). v=-12 + 6t 0=-12 + 6t 2=t

When I then plug -2 into original? 39?

So plug in 0 for v? 0=12 + 6t -2=t?

a=6?

x = 3.00 - 12.00t + 3t2 v= 12 +6t?

I don't want to answer but can you give me a hint as to how I would find that? Well, if it's stopped...0?