Oh, and for the first problem, I got some obscure answer. Here's my work.
(w/ kids)
m=200kg+100kg
Vi=4.0m/s
Vf=10m/s
(empty car.)
vi=0 m/s
v/f=?
m=100kg
m\Deltav=300*(4-10)=-1800kgm/s
-1800=100(x-0)
/100
Vf= -800 m/s
but that seems way off.
Impulse help! emergency.(3 problems)
Alright, so I have these problems due tomorrow, and I was out the other day so I do not understand it. If someone can tell me how to set each up, then I can probably work it out.
Equations
impulse= Force*\DeltaTime
Force*\DeltaTime=mass*\Deltavelocity...
Okay, I was absent the day we did impulse at school, so now I'm confused as to how to do some of it. I just need to know how to set up the problems, I know that impulse=F\Deltat and that F\Deltat=m\Deltav...but I don't know where to go after that.
The first problem:
Two children, totaling...