Physics
posted by Anonymous .
Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1200 kg and is approaching at 8.00 m/s due south. The second car has a mass of 850 kg and is approaching at 17.0 m/s due west.
(a) Calculate the final velocity (magnitude and direction) of
the cars. (b) How much kinetic energy is lost in the collision?

a. momentum is conserved
Intial momentum=final momentum=
1200*8S+850*17W=(2050)V
V=4.68S+7,05W
magnitude=sqrt(4.68^2+7.05^2)
direction: arctan4.68/7.05 S of W 
a. M1*V1 = 1200 * (8i) = 9600i.
M2*V2 = 850 * (17) = 14,450.
14,450  9600i = 1200V+850V,
17,349[213.6o] = 2050V,
V = 8.46 m/s[213.6o] = 8.46 m/s[33.6o] S. of W. 
OOPS! Henry, not anonymous!