Recent content by tornzaer

How can I make it in terms of x and y components when I have a z component as well?

Anyone? I need some help because this is due tomorrow morning.

Homework Statement A projectile of mass 1 kg is launched from ground level toward the east at 200 metres per second, at an angle of pi/6 to the horizontal. A northerly win applies a force of 2 Newtons to the projectile. Find the location of the projectile and its speed at impact. Homework...

That's not the answer according to calculators.

Third would be -cosx/6

The first time applied gives me: (cosx - 1) / 3x^2 The second: (-sinx) / 6x I definitely know this is wrong...

Homework Statement lim -> 0 (sin(x)-x) / x^3 Homework Equations L'Hospital's Rule The Attempt at a Solution I could just use L'Hospital's rule since it's 0/0. However, the answer is wrong when I do it that way. What am I missing? It states on the question that it must be...

Alright. How would I go about setting up the equation then? I'm still not clear on that.

Homework Statement A tank is initially filled with 1000 litres of brine, containing 0.15 kg of salt per litre. Fresh brine containing 0.25 kg of salt per litre runs into the tank at the rate of 4 litres per second, and the mixture (kept uniform by stirring) runs out at the same rate. Show...

Thanks for the replies. What happens if vectors aren't connected like the ones on the diagram I posted. There are vectors in the same direction and different directions, but they are all separate. Also, on question b on the diagram, it asks to find the sum of moments at B. That's what I'm...

Homework Statement http://img41.imageshack.us/i/photolu.jpg/ Homework Equations Right Hand Rule The Attempt at a Solution I have to find the moments at B. I know I have to use the right hand rule to figure out which force has a positive and which force has a negative action...

3) So it will be (3)^2-4(4k)(k) which is 9-16k^2 > 0.

2) How do I go about solving the system of equations? 3) How can I find a,b,c when I don't know what K is?

2) What am I to do with the radius though? 3) I'm not too clear on this. Could you give an example?

2) 5/2. I subtracted instead of adding... 3) So k has to be a positive number?