Recent content by jstep

aha! thanks!

Is there a way to simplify a^log[b]n, a = 1 / b I don't know if this is possible, but I thought I would ask for another opinion if I'm overlooking something. Anyway, is there a way to simplify alogbn, a = 1 / b

so then the boat will remain stationary as the child walks across it? vi, child = 0 vi, boat = 0 mboatvi, boat + mchildvi, child = 0 vf, child > 0 vf, boat = ? mboatvi, boat + mchildvi, child = mboatvf, boat + mchildvf, child 0 = 89vf, boat + 29vf, child if vf, child > 0 vf, boat must be...

so the child's position would remain constant as the position of the boat changes?

Homework Statement I'm doing a review for a Mechanics exam I have tomorrow and this first problem given on the review struck me as odd. Problem Statement: An 89kg boat that is 6.6m in length is initially 7.1 m from the pier. A 27 kg child stands at the end of the boat closest to the pier...

thanks so much!

Oh okay, so let me just make sure I understand: so this is the correct way to find the initial potential energy? U = mgLsin\theta where L is the length to the center of mass

Homework Statement I am asked to find the angular velocity of a falling rod in the instant that the rod meets the horizontal. The system is set up in this image: The only force acting on the rod is gravity Homework Equations U = (1/2)MgL K = (1/2)Iw2 Kf + Uf = Ki + Ui The...

Need Simple Clarification: Tension and acceleration, one floating block, one sliding Homework Statement gravity is 9.81m/s2 m1 = 2.62kg m2 = 7.62kg [PLAIN]http://uploadpad.com/files/Screen_shot_2011-02-27_at_5.40.01_PM.png Assume the cord to be light (massless and weightless) and...

the only thing that is constant is acceleration in the y-direction, acceleration in the x-direction is increasing. are you speaking of conservation of energy? I don't understand how that applies to this scenario... I don't even have the object's mass.

Homework Statement a cart slides down an iced incline that is 159m high. initial speed is 0m/s acceleration of gravity is 9.8 m/s^2 neglect friction, air resistance determine carts speed at the bottom of the hill Homework Equations v = u + at, but no time is mentioned v^2 = u^2 + 2ah...