Recent content by pyman999

1. 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. Gravitational potential

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

Thank you, this cleared it up.
7. 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...