Recent content by mdewdude

The angular momentum is 2.663 * 10 ^40 kgm2s-1 of the Earth and the sun and the angular momentum of the Earth and moon is 2.88E+34. The angle of the tilt of the Earth is 23.8 degrees. and when i convert the years into seconds i got 8.19*10^11 sec. So after i found the angular momentum...

Homework Statement The Earth's axis of spin precesses just like that of a top or a gyroscope. (This is why the North Star moves away from the north over many centuries.) The cause is the torque on the Earth due to the gravitational pull of the moon and the sun on the Earth's equatorial...

Would this work as well: if the bar was suspended in the center as the mass of the bar is equal on both sides of the suspension

Homework Statement When analyzing the torques on a suspended bar such as meter stic, under what conditions is it acceptable to ignore the mass of the bar itself? Homework Equations NONE The Attempt at a Solution The only condition that I can find is when the mass of the bar...

Homework Statement Biomedical measurements show that the arms and hands together typically make up 13.0 % of a person's mass, while the legs and feet together account for 37.0 %. For a rough (but reasonable) calculation, we can model the arms and legs as thin uniform bars pivoting about the...

Thanks, for the help, sorry that i couldn't reply much sooner. you are right on the equation but having the numbers on which side of the equation was wrong. To find the kinetic energy from the escape, would it be just the simple KE=0.5 mv^2 the question would be, which mass would it be...

Sorry, I am horrible at this momentum stuff. Could somebody tell me if I'm on the track or could possibly steer me into it? Thatnk you

Mass of whale with water* desired velocity= Mass of whale escape * velocity of escape would this be the proper equation?

Homework Statement Squids and octopuses propel themselves by expelling water. They do this by taking the water into a cavity and then suddenly contracting the cavity, forcing the water to shoot out of an opening. A 6.50 kg squid (including the water in its cavity) that is at rest suddenly...