Physics Homework
- Thread starter Zampy
- Start date
Fluffy
Vote Stewart/Colbert in '08!
<div class='quotetop'>QUOTE(Zampy @ Dec 2 2005, 02:00 PM) [snapback]3301[/snapback][/center]
A 1400 kg car, heading north and moving at 35 miles per hour collides in a perfectly inelastic collision with a 4000 kg truck going East at 20 miles per hour.
a.
What is the speed and direction of the wrecked vehicles just after collision?
b.
What percentage of the total mechanical energy is lost from the collision?
Note: units are not so important here. Feel free to use kg miles/hour for momentum and kg - mi^2/h^2 for energy.
MUHAHAHAHAHHAHAHAHAH!!!!!
A 1400 kg car, heading north and moving at 35 miles per hour collides in a perfectly inelastic collision with a 4000 kg truck going East at 20 miles per hour.
a.
What is the speed and direction of the wrecked vehicles just after collision?
b.
What percentage of the total mechanical energy is lost from the collision?
Note: units are not so important here. Feel free to use kg miles/hour for momentum and kg - mi^2/h^2 for energy.
MUHAHAHAHAHHAHAHAHAH!!!!!
Fluffy
Vote Stewart/Colbert in '08!
Consider the following metric, in the coordinates x? = (u, v, x, y):
ds2 = −2dudv + a2(u)dx2 + b2(u)dy2 ,
where a and b are for the moment arbitrary functions of u. Physically this metric
corresponds to a plane-fronted gravitational wave moving in the u direction. Note that
u and v are ?null coordinates,? rather than timelike or spacelike; there?s nothing wrong
with that.
(a) Calculate the connection coefficients and Riemann tensor for this metric, and
calculate the scalar R?R?.
(B) Find a complete set of Killing vector fields on this spacetime. (Hints, which
you need not show: there are five Killing vectors in all, and all of them have a
vanishing u component Ku.)
© Introduce functions
A(u) = Z u
a−2(u0)du0 , B(u) = Z u
b−2(u0)du0 .
Find the general solution x?() to the geodesic equation in this metric, and express
your solution in terms of A and B.
Have fun physics monkey!
ds2 = −2dudv + a2(u)dx2 + b2(u)dy2 ,
where a and b are for the moment arbitrary functions of u. Physically this metric
corresponds to a plane-fronted gravitational wave moving in the u direction. Note that
u and v are ?null coordinates,? rather than timelike or spacelike; there?s nothing wrong
with that.
(a) Calculate the connection coefficients and Riemann tensor for this metric, and
calculate the scalar R?R?.
(B) Find a complete set of Killing vector fields on this spacetime. (Hints, which
you need not show: there are five Killing vectors in all, and all of them have a
vanishing u component Ku.)
© Introduce functions
A(u) = Z u
a−2(u0)du0 , B(u) = Z u
b−2(u0)du0 .
Find the general solution x?() to the geodesic equation in this metric, and express
your solution in terms of A and B.
Have fun physics monkey!
SynTaXx-Wrath
If you're happy, I'm. . .
<div class='quotetop'>QUOTE(Zampy @ Dec 2 2005, 02:00 PM) [snapback]3301[/snapback][/center]
and woahhh woahhh wait a minute, homework? how old are you Zampy
Fluffy
Vote Stewart/Colbert in '08!
<div class='quotetop'>QUOTE(LilHammie @ Dec 2 2005, 07:52 PM) [snapback]3490[/snapback][/center]
My mom wouldn't touch a lizard. She'd be too busy turning you into a nice handbag...or some lugage.
He's in college....
And Fluffy all the physics questions in the world couldn't stop me from banging your mom!
[/b]
My mom wouldn't touch a lizard. She'd be too busy turning you into a nice handbag...or some lugage.
Shaggz1297
New member
<div class='quotetop'>QUOTE(Zampy @ Dec 2 2005, 02:00 PM) [snapback]3301[/snapback][/center]
it only gets worse lol.
