Thread: Physics which involves SIMPLE GEOMETRY, really urgent, please help!

I've attached a picture which include the question -- I found it on the net, and it's exactly the same as my homework.

I've got hints on this before, but I don't understand how to calculate the length, so please show me how if you can

Originally Posted by KiyoEtAlice

I've attached a picture which include the question -- I found it on the net, and it's exactly the same as my homework.

I've got hints on this before, but I don't understand how to calculate the length, so please show me how if you can

Actually you are dealing with a right triangle. (see attachment)

According to Euklid's theorem you have:



Solve for R.

thanks but can you tell me what "d" value is supposed to be? I think I got things mized up. "h" is 5 for the ball right?

Originally Posted by KiyoEtAlice

thanks but can you tell me what "d" value is supposed to be? I think I got things mized up. "h" is 5 for the ball right?

The text of the problem says: "... They both travel 10 m in the x-direction. ..." So here you have d = 10 m

Originally Posted by earboth

The text of the problem says: "... They both travel 10 m in the x-direction. ..." So here you have d = 10 m

Okay Thanks!

I've done it, and my R for each of the cases come out differently, is this supposed to happen?

Originally Posted by KiyoEtAlice

Okay Thanks!

I've done it, and my R for each of the cases come out differently, is this supposed to happen?

of course. The curve of the ball is much more bent than the curve of the bullet. Thus the radius connected to the curve of the ball is much smaller than the radius of the curve of the bullet.

I've got and

Originally Posted by earboth

of course. The curve of the ball is much more bent than the curve of the bullet. Thus the radius connected to the curve of the ball is much smaller than the radius of the curve of the bullet.

I've got and

Okay, thanks! I've got the same result. Thanks a lot!