Homework Statement
A rod AB of length 2m moves in horizontal x-y plane. at any instant end A of rod is at origin and has velocity v_a =2i +v_y j. the other end B at the same instant is moving with velocity v_b = 2i +6j. the rod makes an angle of 30 degrees with the x-axis at this instant...
Homework Statement
A bohr`s model of an atom,taking the radius of the hydrogen atom as r=5.29*10^-11m ,find the strength of the force on the electron,its centripetal acceleraton and itsorbital speed.
Homework Equations
The Attempt at a Solution
Four circular cardboard pieces each of radius 7cm are placed in such a way that each piece touches two other pieces.Find the area of the encosed by the four pieces.Can anyone help me to solve this problem?