Recent content by Arcarius

Thanks for the response! So, for c I got E = (50,662.5PA)(4/3 * pi (0.20m)^3) = 1700 J And for D: 1700 J = 0.5Iw^2 w = sqrt(3400J / I) I = 0.27 kg * m^2 W = 110 rad/s

Homework Statement Heron of Alexandria invented the steam jet engine in the first century A.D. One of his many inventions, the one shown below was invented for amusement but employs many concepts not again used until the 18th century. A caldron with water in it was heated by fire and the...

Awesome, thank you for your help! Your questions really helped guide me :)

Thank you for the response! The forces acting on it are kv going upwards and mg going downwards. I'm taking the downwards direction as positive, meaning that the net force acting on it is mg-kv which is equal to ma. So the acceleration is equal to (mg-kv)/m, and I know that it is 0 when it...

Homework Statement An egg of mass 0.10 kg is dropped from rest at a height h. It is known that the egg dropped experiences a force due to air resistance of the form F = -kv, where v is the velocity of the egg and k is a constant of proportionality equal to 0.01781 N*s/m. What is the terminal...

Homework Statement Homework Equations Net Torque = F1I1 + F2I2The Attempt at a Solution In the y direction, the net force is: 0 = F2-Fg, so F2=Fg. I attempted to do the problem by resolving the net torque, where I defined CW as positive and CCW as negative, so I got: Net Torque = (0.750m)F1...

Ohhh I see. So it is 2R, I was just lucky that the numbers worked out when I did it my way.

Hmm, I see what you mean. I seem to have confused the moment of Inertia with the Moment Arm. In that case, I'm not sure how to use the information I have to get an answer :/

I had I as the Moment of Inertia.

This is the diagram I drew, and you get that D/2 = sqrt(R^2 - I^2). I then just solved for D, and it actually turned out to be approximately 2R.

OH. Ugh, stupid mistake on my part! I used trig and got D to be 1.20 x 10^-10 m. Thanks!

Homework Statement An oxygen molecule consists of two oxygen atoms whose total mass is 5.3x10^-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.9 x 10^-46 kg*m^2. From this data, estimate the effective distance between...

Thanks for the reply! Well, I know that the formula is m1x1 + m2x2... / (m1 + m2...) I guess using this formula in my response will help reinforce it?

Homework Statement An unlikely weapon was once proposed which had all of the people in China to jump up and down simultaneously. Let us say there are 2 billion people (2.0 x 10^9) with an average mass of 50 kg. They all climb ladders which are 1 meter tall. At a particular instant they all...