Recent content by kate12

  1. K

    Lifting a prism; coefficient of friction

    Homework Statement A prism has a mass of m = 80 g, and you wish to lift it, touching the upper two faces only. If the coecient of friction between the prism’s surface and your skin is  = 0:4, what is the minimum force that must be applied to each face? Homework Equations F=μR...
  2. K

    How do I determine the current amplitude and phase angle in an RLC AC circuit?

    I=V0/|Z| ? But that gives me I0= V0/|Z|ei(ωt+θ).
  3. K

    How do I determine the current amplitude and phase angle in an RLC AC circuit?

    z = R + iωL +1/iωC ?
  4. K

    How do I determine the current amplitude and phase angle in an RLC AC circuit?

    Ohh. The circuit is like this one: with no values given.
  5. K

    Particle constrained by 4 springs SHM

    A point mass is constrained to move in the horizontal plane. It is attached to four fixed pegs by four light springs. The four pegs are arranged at the corners of a square of side a√2. Each spring has natural length a/2 and spring constant k. Show that the mass executes SHM with angular...
  6. K

    How do I determine the current amplitude and phase angle in an RLC AC circuit?

    Voltage V(t)=V1 Re{eiwt} produces a current I(t)=I1 Re{e(iwt+θ). Determine I1 and θ. The circuit is AC so do I treat it the same as an SHM question? Is π/2? And what do I need to do to find I1? I don't know where to start.