# 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?

1. 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

2. 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.

3. Henry

OOPS! Henry, not anonymous!

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