Recent content by GoodTimes

I need a bit more help, i don't know what to use as xoa and xob :-(

thanks a lot for helping me i calculated both and got x_{A} - x_{B} = 600m is this correct and even possible? cause how are they supposed to collide after 600m if Train A stops completely after 450m?

I calculated that they do collide but i don't know how to calculate where How do I find out where they collide? Train A travels 30seconds 450m during that time Train B travels 150m (+200m) it is less , so they collide.

Ok I tried another equation s=1/2 * (deltaV)² / a s= 1/2 * (30m/s) ² / 1m/s² s=1/2 * 900m²/s² / 1m/s² s=1/2 * 900m/ 1 s=450m is this correct? I would be so glad and happy if it was, usually I feel so dumb since I started university

Homework Statement Train A travels with the velocity v= 30m/s, suddenly the driver sees another train ahead, Train B which travels with the velocity v=10m/s. Immediately Train A's driver starts the brakes ( a=1m/s²) while Train B still travels with its velocity. The moment A starts the brakes...

ahhh it is $$ \vec r'(t) = (2t+1)\vec e_x + (3)\vec e_y + (6t²-8t)\vec e_z $$

I am sorry, yes correct, my task is to find the velocity and the acceleration. does your post mean that the two equations I've done are correct? so i could simply put in a t, for example t=2 and calculate it

Hello, I am new here, glad I found this Forum :0) I am german and english is not my mother-tongue, so sorry in advance for any language-related mistakes 1. Homework Statement i don't know how to make a vector arrow on a letter so I declare a v for vector as the following...