Recent content by morrisj753

Homework Statement A homogeneous ring lays horizontally on two identical parallel rails. The first rail moves parallel to itself, with a constant speed v; the second rail is at rest. The angular distance between the ring-rail contact points, as seen from the center of the ring, is 2α for the...

Thank you for the response, and yes, I did end up with the correct answer.

Homework Statement A point object of mass M hangs from the ceiling of a car from a massless string of length L. It is observed to make an angle θ from the vertical as the car accelerates uniformly from rest. Find the acceleration of the car in terms of θ, M, L, and g. Diagram...

@Signature PF: You might have made an error, because you forgot about the negative, it'd be x = - ma / k @TSny: Fe i suppose does not act directly on m, but the weight DOES directly affect the mass m. The way the problem is worded, the weight overcame the force of the spring. mg - (-kx)...

Homework Statement A mass m is resting at equilibrium suspended from a vertical spring of natural length L and spring constant k inside a box. The box begins accelerating upward with acceleration a. How much closer does the equilibrium position of the mass move to the bottom of the box...

Homework Statement A uniform rectangular wood block of mass M, with length b and height a, rests on an incline as shown. The incline and the wood block have a coefficient of static friction, µs. The incline is moved upwards from an angle of zero through an angle θ. At some critical angle the...

You end up with 1/√2 A, which is the correct answer. Thank you very much for the help!

well, by substituting k' = 2k, you end up with A^2 = 2 (A')^2

When Bob pulls with 3 N, the spring exerts a force of - 3 N to oppose it. So you account for 3N only once. F=kx 3 = 10x x = 0.3 m 2 + 0.3 = 2.3 m

Homework Statement A mass is attached to the wall by a spring of constant k. When the spring is at its natural length, the mass is given a certain initial velocity, resulting in oscillations of amplitude A. If the spring is replaced by a spring of constant 2k, and the mass is given the same...

1) 10. Four objects are placed at rest at the top of an inclined plane and allowed to roll without slipping to the bottom in the absence of rolling resistance and air resistance. • Object A is a solid brass ball of diameter d. • Object B is a solid brass ball of diameter 2d. • Object C is a...