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A drunk driver in a 2100 kg car plows into a 1400 kg parked car with its brake set. Police measurements show that the two cars skid together a...

A drunk driver in a 2100 kg car plows into a 1400 kg parked car with its brake set. Police measurements show that the two cars skid together a distance of 25 m before stopping.

If the effective coefficient of friction is 0.74, how fast was the drunk going just before the collision?

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