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  1. pyman999

    Gravitational Field Strength

    Homework Statement Homework Equations g = GM / r^2, where g is the gravitational field strength, G is the gravitational constant, M is the mass of the attracting body, r is the radius of the attracting body. p = M / v, where p is density and v is the volume. Vs = 4/3 * pi * r^3, where Vs is...
  2. pyman999

    Gravitational potential

    I see, so then you're left with -2GM / r + -2GM / r, my mistake.
  3. pyman999

    Gravitational potential

    Homework Statement Homework Equations g = G*M / r^2, where g is the gravitational field strength, G is the gravitational constant, M is the mass of the attracting body, r is the distance from the center of mass of the body. V = -G*M / r, where V is the gravitational potential. The Attempt...
  4. pyman999

    Simple harmonic motion acceleration

    I'm fairly sure the answers I have been given for this question are wrong then, as I'm also getting weird results for later parts, thanks.
  5. pyman999

    Simple harmonic motion acceleration

    Homework Statement Homework Equations acceleration = -(2*pi*f)^2 * x, where f is the frequency and x is the displacement from equilibrium. The Attempt at a Solution I thought the acceleration would be greatest when the displacement from equilibrium is greatest, so at point P, but the answer...
  6. pyman999

    Simple harmonic motion question

    Thank you, this cleared it up.
  7. pyman999

    Simple harmonic motion question

    Homework Statement http://puu.sh/cAjmp/14ba3df23a.jpg [Broken] Homework Equations Acceleration at any instant: -(2*pi*f)^2 * x, where x is displacement from equilibrium and f is frequency. The Attempt at a Solution Firstly, I know it can't be D as acceleration would increase as potential...
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