shit 5. A 2200.0-kg Cadillac and a 1100.0- Just turned green, and the Cadillac,

Question

shit 5. A 2200.0-kg Cadillac and a 1100.0- Just turned green, and the Cadillac, heading north, drives forward into the intersection. The kg Volkswagen meet at an intersection. The stoplight has Volkswagen traveling east, fails to stop. The Volkswagen cras Cadillac; then the cars stick together and slide to a halt. Officer Tom, responding to the accident, sees that the skid marks are directed 53.0° north of east from the point of impact. The driver of the Volkswagen, who keeps a close eye on the speedometer, reports that he was traveling at 42.0 m/s when the accident occurred. How fast was the Cadillac going just before the impact? ing east, fails to stop. The Volkswagen crashes into the left front fender of the

Explanation / Answer

Let Vv be the intial speed of Volkswagen.

Momentum will be conserved in all directions, so
Using trigonometry

tan(theta) = Pc/Pv

Pv = Pc/tan(theta)

Pv = Mc Vc/tan(theta)

Pv = 2200 x 42/tan53 = 69628.4 kg-m/s

Mv Vv = 69628.4 kg-m/s

Vv = 69628.4/1100 = 63.3 m/s

Hence, Vv = 63.3 m/s

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