Car 1 hits car 2 and sets car 2 into 180 degree rotation. Both cars are of similar dimensions and about the same weight. What was the speed of car 1 at impact?(adsbygoogle = window.adsbygoogle || []).push({});

Assume that car 2 had a speed of 20 mph (29.3 ft/sec) in the opposite direction at impact.

I am stuck in using the conservation of linear momentum because the rotation of car number 2 involves a rotation of 180 degrees.

The kinetic energy of car 1 is converted into the rotational energy of car 2.

Pi rad = 180 degrees. How do I substitute this into omega squared of 1/2 I omega squared?

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# Crash of two cars: What was the speed of car 1 at imact?

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