Recent content by kikifast4u

  1. K

    Calculating volume using triple integrals

    Thank you very much! I got the same answer as in the second method, so both are fine. Stupid stupid mistake!
  2. K

    Calculating volume using triple integrals

    I'm still struggling with this. Any help guys?
  3. K

    Calculating volume using triple integrals

    Homework Statement Find the volume of the solid enclosed between the cylinder x2+y2=9 and planes z=1 and x+z=5Homework Equations V=∫∫∫dz dy dzThe Attempt at a Solution The problem I have here is setting the integration limits. I first tried using: z from 1 to 5-x y from √(9-x2) to -3 x from -3...
  4. K

    How can energy conservation be applied to a spring connecting two masses?

    http://img5.imagebanana.com/img/1lujnz38/thumb/pb.png That's what I mean by h. If you are able to push top disc so much, then potential energy in spring is (kh^2)/2. Since k is very big, I think we can assume it will not extend when mass from below will start to lift and will actually act as...
  5. K

    How can energy conservation be applied to a spring connecting two masses?

    Homework Statement Two discs, each of mass m are connected by a stiff spring. Can you press the top disc down so far that when released it will spring back and lift the bottom disc off the table? Discuss the application of energy conservation to this problem. 2. The attempt at a solution...
  6. K

    Circular motion and speed of rotation

    I do hope so. Otherwise I don't think I have enough data to get a numerical value. Thanks!
  7. K

    Circular motion and speed of rotation

    Homework Statement There's a 'chair-o-plane' with a radius of 4m and the seats are connected using 3m chains. a) Calculate the speed of rotation at which the chains make an angle of 35 to the vertical b) What is the tension in the chain if a rider of 90kg is on the swing at the speed above...
  8. K

    Outer space shuttle movement

    No, unfortunately it doesn't say anything except that it moves with its engines off. Then something happens and starts moving in a straight line, with constant speed to point B. There has to be a force that causes a change in the movement. However, looking back at the problem, the question is...
  9. K

    Outer space shuttle movement

    Thank you for your answer. I know that acceleration is 0, and that there is no force acting on the shuttle. But then what makes it change its direction at point A?
  10. K

    Outer space shuttle movement

    So this was a test question, I got the wrong answer, now I know why, but I'm not sure which is the good answer Homework Statement A spaceship is flying in outer space, engines off. At a certain point A in space, the spaceship starts drifting sideways with a constant speed and in a straight...
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