Saturday
July 26, 2014

Homework Help: Algebra

Posted by Celina on Wednesday, November 5, 2008 at 4:41pm.

Once again, I have some confusing problems for math. If you know any answers, even if you only know one, please tell me the answer and walk me through it so I can actually understand how you get to it. Thanks!

#1: A space craft travels at a speed of 8/10 of a mile per second. How many days does it take it to travel from the Earth to the Moon, a distance of 240,000 miles?

At first, my answer I got was 208 1/3 days, but to me that sounds way to long for a spacecraft, considering how fast it is going. The other possible answers I got are that maybe I need to move the decimal point, so maybe 20.8 days or 2.08 days. Please tell me if any of these answers are right.

#2: How much force, in gcm/s (that's to the second power, if you can't read that symbol) is exerted by a golf ball striking a tree while accelerating at 20 cm/s? Show how you can solve this problem without knowing that F = ma.

Of course, I don't even know what in the world F = ma is. Okay, my sister told me it means Force equals mass times acceleration, but I wouldn't even know how to apply it to this problem.
Try to solve this problem. It did say in the problem a golf ball like the one in problem #9 on my worksheet, so if you need more info to solve this problem, I can give you problem #9, too.

I appreciate any help you can give me. Thank you!

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