calculus help!

starryqt22
Sun, 06 Feb 2005 00:55:09 +0000

Can anybody give me a tip on solving this problem?

A particle moves along the y-axis so that its velocity at any time t>or equal to 0 is given by v(t)=tcost^2. At time t=0, the position of the particle is y=3. For what values of t, when t is between 0 and 5 and can equal both, is the particle moving upward?

-Okay so i know that the particle moves upward when velocity is positive, but I am confused about the y-axis part. When I graph it, it crosses the y-axis in only one spot, at 0.

Thanks for any help!