- #1
seiferseph
- 102
- 0
1) I'm having trouble with this problem, it looks like their isn't enough information. can someone give me some hints please
http://i2.photobucket.com/albums/y15/seiferseph/untitled.jpg
2)
http://i2.photobucket.com/albums/y15/seiferseph/untitled2.jpg
i solved parts a-c fine, but I'm having some trouble with d and e
i solved v(t) 6t^2 - 30t + 2 and a(t) = 12t - 30 (taking the derivative). for d and e it is looking for a range, right? here's what i got
d) it is moving left when v(t) < 0, so between the zeros, or 0.676 < t < 4.93
and it is moving right when v(t) > 0, or t < 0.676 and t>2.5
e) p is speeding up when both v(t) and a(t) are in the same direction, and slowing down when they are opposite directions (signs)
i got a(t) > 0 when t > 5/2, and a(t) < 0 when t < 5/2. so its speeding up when t > 4.93 and slowing when 0.676 < t < 2.5
thanks in advance!
http://i2.photobucket.com/albums/y15/seiferseph/untitled.jpg
2)
http://i2.photobucket.com/albums/y15/seiferseph/untitled2.jpg
i solved parts a-c fine, but I'm having some trouble with d and e
i solved v(t) 6t^2 - 30t + 2 and a(t) = 12t - 30 (taking the derivative). for d and e it is looking for a range, right? here's what i got
d) it is moving left when v(t) < 0, so between the zeros, or 0.676 < t < 4.93
and it is moving right when v(t) > 0, or t < 0.676 and t>2.5
e) p is speeding up when both v(t) and a(t) are in the same direction, and slowing down when they are opposite directions (signs)
i got a(t) > 0 when t > 5/2, and a(t) < 0 when t < 5/2. so its speeding up when t > 4.93 and slowing when 0.676 < t < 2.5
thanks in advance!
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