Recent content by Trojanof01

A tether ball leans against the post to which it is attached (Fig. 5-40). If the string to which the ball is attached is 2.00 m long, the ball has a radius of 0.300 m, and the ball has a mass of 0.400 kg, what are the tension in the rope and the force the pole exerts on the ball? Neglect any...

Bump, anybody?

So I have a point A on a graph with x and y axes. From the origin, the point is 3r to the right, and 1r up. I'm to find the Moment of Inertia along the x, y, and z axes. I've found the x and y moments, but not the z and I'm not really sure on how. I'm not getting any ideas from the graph...

Thanks, my calculus is a bit rusty and I integrated instead of differentiated...

Hey I'm sorry I'm not a physics genius like you are cepheid. I appreciate the help but I can do without the snide comments. Anyway, I was leaning toward differentiating and I tried it and came out with a wrong answer. Computations were probably inaccurate though.

A fan blade rotates with angular velocity given by omega_z(t) = gamma - Beta(t)^2 . Calculate the angular acceleration as a function of time. I don't even know where to begin and my book is all but useless. Any ideas?

Oh! /smack That made that so much more simple. Thanks much.

A wagon wheel is constructed as shown in the figure. The radius of the wheel is 0.300 m, and the rim has mass 1.36kg . Each of the eight spokes, that lie along a diameter and are 0.300 m long, has mass 0.270kg . What is the moment of inertia? Wouldn't it just be the sum of the masses...

Solved it, had the velocity of the block incorrect and that screwed me up in the final calculation. Thanks.

Bullet is fired at a block resting on a table. The velocity of the bullet is 390 m/s and has a mass of .007kg. The mass of the block is .850kg. The bullets penetrates the block and exits it with a velocity of 130 m/s causing the block to slide a distance of .410 m. What is the coefficient...

The key is to find the Initial and Final centers of mass. Initial: Woman's CoM = 1m , Canoe's CoM = 2.5...What's the CoM of the entire system? Final: Woman's CoM = 4m , canoe's CoM = 2.5...CoM of System? Final CoM - Initial CoM = your answer

This is what I've done so far Work-energy theorem: E_f-E_i=W_fr: 0-(1/2)*m*v^2=- mu*m*g*2*x x = .5v^2 / (2g(mu)) Max compression of spring W=-mu*m*g*x E_i=(1/2)*m*v^2 ) E_f=(1/2)*k*x^2 Work-energy theorem: (1/2)*k*x^2-(1/2)*m*v^2=-mu*m*g*x Plugged into x and...

An object of mass m is traveling on a horizontal surface. There is a coefficient of kinetic friction, mu , between the object and the surface. The object has speed v when it reaches x=0 and encounters a spring. The object compresses the spring, stops, and then recoils and travels in the opposite...