Recent content by fmadero

Well prb was due this morning and alas I didn't get the correct response for the range. I was suppose to add the initial horizontal velocity of 15 to the x(t) equation. I am sure you guys knew this but I couldn't see it, thanks for everyone's help.

O gosh I am an idiot "V" in my equation above is not initial velocity rather initial speed. so my equations are as follows \displaymath x \left( t \right) = \left( \nu_0 cos \alpha \right) t\, and \,y(t) = \frac{-1}{2}gt^2 + (\nu_0 sin \alpha)t +s_0 where x(t) and y(t) denote the horizontal...

O gosh I am an idiot "V" in my equation above is not initial velocity rather initial speed. so my equations are as follows x \left( t \right) = \left( \nu_0 cos \alpha \right) t \newline\newline x(t)\, is\, horizontal\, component\, of\, \mathbf{R} \left( t \right) =

But how do I get the rock's initial velocity if I treat the 2 vectors separate? I need a scalar quantity(not a vector) for the rocks initial velocity with respect to the earth.

Right, so I get a velocity vector back how do I change this to a scalar quantity? Take the magnitude I would presume? You know that the strange part is I got the correct answer for "Time of flight" using the initial velocity of 25ft/s.

So do you mean that the initial velocity(V) for both equations should be 40ft/s?

Homework Statement A child running along level ground at the top of a 30-ft-high vertical cliff at a speed of 15 ft/s, throws a rock over the cliff into the sea below. Suppose the child's arm is 3ft above the ground and her arm speed is 25ft/s. If the rock is released 10ft from the edge of the...

Sorry I was trying to interleave my responses, I don't use forums too often. thanks frank

Where did you read this from? You recommend any sites or books?

Yes! one is just longer than the other and since one is longer than the other they share common points thus they are not parallel by the definition of parallel lines right?

Homework Statement I have a problem with this statement in a Calculus book: A scalar multiple s\vec{v} of \vec{v} is parallel to \vec{v} with magnitude |s|\ ||\vec{v}|| and points in the same direction as \vec{v} if s>0, and in the opposite direction if s<0 What bothers me about this...

I am thinking maybe an analytical engineer, may be in control systems/senors or robotics/automation but I am not completely for sure. Ideally if I could use my background in computer science and could combine this with electrical and/or mechanical it would be a dream come true. -frank

Woops I meant to say I was using the 1st Deriv. Test not 1st Integral Test.

Yes, I came to the conclusion that the series diverges because of the "Alternating Series Test" see original problem looked like \displaystyle \sum^{\infty}_{k=1} {\left(-1\right)^{k+1} \left( \frac{k}{k+1}\right)^{k}} and I knew it failed one of the conditions of the test but I wanted to see if...

ok I see what I can't do but do you have an ideas how this could be solved?