Asteroid Collision: Calculating Impact Speed

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An asteroid traveling at 12 km/s is 10r away from Earth, prompting a discussion on calculating its impact speed. The gravitational potential energy formula U = -Gm[E]m / r is mentioned, but participants emphasize the need for the original poster to show effort in solving the problem. Without specific values for constants like r or G, the problem cannot be adequately addressed. Additionally, if the asteroid is moving away from Earth, the impact speed calculation becomes irrelevant. Clearer parameters and initial calculations are necessary for a meaningful discussion on impact speed.
Willis2833
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1. An asteroid is 10r away from the earth, and traveling at a speed of 12 km/s. What is the impact speed of the asteroid when it hits the earth?2. Gravitation problem: U = -Gm[E]m / r ...I think3. I've been looking in my book and online and cannot figure it out, please help!
 
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Willis2833, we'd really like to help, but the Rules at PF state the OP must show some effort at solving the problem posted. Unfortunately, 'I cannot figure it out,' isn't good enough. I mean, you should write down some numbers at least, or the value of the constants like r or G, or Me.
 
Surely there is not enough information to answer the question.

If the asteroid's speed is away from Earth, then the answer is: "not applicable".
 

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