Recent content by oscar_lai_hk

  1. O

    Optimal Wire Shape for Constant Horizontal Speed | Bead under Gravity

    The answer is : y = (square root(mg) ) X /v
  2. O

    Optimal Wire Shape for Constant Horizontal Speed | Bead under Gravity

    I try to solve this problem of conservation energy.but why the answer not include y = 0?
  3. O

    Maximizing Projectile Motion: Finding the Optimal String Cut Location

    I can write the equation towards the center : T + mg cos0 = mv^2/R and I consider the energy at the moment of escape and the highest position I get the equation (0.5)mv^2 = (0.5)m(vcos0)^2 + mgy then I try to diff. the above equation of y respect to the angle 0 it is right?
  4. O

    Maximizing Projectile Motion: Finding the Optimal String Cut Location

    A mass is attached to one end of the massless string, the other and of which is attached to a foxed support. The mass swings around in a vertical circle as shown in Fig 5.36. Assuming that the mass has the minimum speed necessary at the top of the circle to keep the string from going slack, at...
  5. O

    Optimal Wire Shape for Constant Horizontal Speed | Bead under Gravity

    A bead, under the influence of gravity, slides along a frictionless wire whose height is given by the function y(x), Assume that at position 9x,y) = (0,0), the wire is horizontal and the bead passes this point with a given speed v to the right. What should the shape of the wire be(that is, what...
  6. O

    Optimizing Projectile Motion: Finding the Maximum Height in a Vertical Circle

    A mass is attached to one end of the massless string, the other and of which is attached to a foxed support. The mass swings around in a vertical circle as shown in Fig 5.36. Assuming that the mass has the minimum speed necessary at the top of the circle to keep the string from going slack, at...
  7. O

    Optimizing Projectile Motion: Finding the Maximum Height in a Vertical Circle

    A mass is attached to one end of the massless string, the other and of which is attached to a foxed support. The mass swings around in a vertical circle as shown in Fig 5.36. Assuming that the mass has the minimum speed necessary at the top of the circle to keep the string from going slack, at...
  8. O

    High School Understanding Orbital Period: Definition, Factors, and Calculation

    What is orbital period?
  9. O

    Undergrad What is the Astronomical Definition of Eccentricity?

    What is eccentricity?
  10. O

    High School What keeps the atmosphere of a planet in place?

    What keeps the atmosphere of a planet in place? THZ