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?

Physics 
bobpursley
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 
Physics 
Anonymous
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. 
Physics 
Henry
OOPS! Henry, not anonymous!
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