Collision of Two Trucks: Calculate Combined Velocity After Inelastic Collision

[teggenspiller]

Homework Statement

Two trucks with the same masses are moving toward each other along a straight line with speeds of 50 mi/h and 60 mi/h. What is the speed of combined trucks after completely inelastic collision?
i assume the 50m/s is moving east, while 60m/s mass is moving west. That would make their final combined velocity

pi=1*50
p2= 1*(-60)
50+(-60)= -1 <--i put this negative one here, cause that's what you did.
10mi/h

Homework Equations

The Attempt at a Solution

pi=1*50
p2= 1*(-60)
50+(-60)= -1 <--i put this negative one here, i think that's right
10mi/h
which is actually wrong..

 

[tiny-tim]

hi teggenspiller!

you didn't put any mass on the RHS of your equation

 

[teggenspiller]

tiny-tim!
-I Did! that's what the 1 is for in 1*50..
is that wrong?

 

[tiny-tim]

hi teggenspiller!

(just got up :zzz: …)

isn't that a part of the LHS?

on the RHS you should have the mass of two trucks