A 0.108kg Frisbee is 0.12 meter in radius and has about half its mass spread uniformly in a disk, while the other half is concentrated in the rim of the Frisbee. With a quarter-tum flish of the wrist, a student starts the frisbee rotating at 550 revolutions per minute. What is the moment of...

http://www.smartphysics.com/images/content/mechanics/ch18/ladder2.png A ladder of length L = 2.7 m and mass m = 24 kg rests on a floor with coefficient of static friction μs = 0.52. Assume the wall is frictionless. A person with mass M = 61 kg now stands at the very top of the ladder. 1....

If you want to rotate a triangle with vertices A(2,2), B(3,3) and C(2,4) about (0,3) at the angle of 90 degree clockwisw direction. The new trigle is formed with the vertices A'(-1,1),B'(0,0) and C'(1,2). How is it??

Why do earth rotates around herself ?

If the solar nebula theory is the correct explanation of how the solar system formed, then what is the likely cause of two planets being highly tilted or rotating “backwards,” and one planet not revolving in the same plane as the rest by more than 10 degrees?