What the first cars speed would have been at the bottom

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A 950kg car is at the top of a 40m -long, 2.5 degree incline. Its parking brake fails and it starts rolling down the hill. Halfway down, it strikes and sticks to a 1230kg parked car.

What the first car's speed would have been at the bottom had it not struck the second car?

Reference no: EM13534871

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