My Math Forum So I got this imaginary number...

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 March 12th, 2017, 11:58 AM #1 Member   Joined: Feb 2014 Posts: 91 Thanks: 1 So I got this imaginary number... I don't think I did this question correctly but anyways what am I suppose to do with this number? Did I make a critical mistake and caused it to be imaginary? Is there more I can do?
 March 12th, 2017, 12:32 PM #2 Math Team   Joined: Jul 2011 From: Texas Posts: 2,639 Thanks: 1317 one mistake I see is in line #5 ... h = 100 cm = 0.1 m. If the ball is sliding without rolling, then $v_f = \sqrt{v_0^2 - 2gh}$ ... so, is the ball rolling or not? Thanks from topsquark and The_Ys_Guy
 March 12th, 2017, 02:06 PM #3 Global Moderator   Joined: Dec 2006 Posts: 18,034 Thanks: 1393 h = 1m If the ball is rolling and not sliding, use the method described in the solution to problem 10 here. Thanks from topsquark and The_Ys_Guy
March 12th, 2017, 02:46 PM   #4
Math Team

Joined: Jul 2011
From: Texas

Posts: 2,639
Thanks: 1317

Quote:
 Originally Posted by skipjack h = 1m
yep ... dyscalcula ... 1.0 m

 Tags imaginary, number

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