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To: Cage Rattler who wrote (75)9/16/1999 1:35:00 AM
From: Lazarus_Long  Respond to of 96
 
That's correct. The way of getting the snswer without math is essentially the same.

Imagine first that there is no gravity (g=0) and the guns are fired. There will be no forces (assuming also no air resistance) on the cannonballs after the guns are fired, and since the cannonballs are aimed directly at each other, they will collide.

Now introduce gravity. Both bullets will fall for the same time under the same downward acceleration (g=32.2 ft/sec^2), so they will fall exactly the same amount and again collide.



To: Cage Rattler who wrote (75)9/16/1999 2:18:00 PM
From: Lazarus_Long  Read Replies (1) | Respond to of 96
 
A straight line segment, one meter in length, has its two end points on the perimeter of a circle (in other words, it is a chord). It is tangent to a smaller circle which is concentric with the first, outer circle which the line crosses.

What is the area of the ring between the two circles?

It is not necessary to know the radii of the circles to solve this problem. There are at least 3 ways of solving it, two of which are simple and short.


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