Determine an expression for the position vector of a particle that starts on the positive y axis at t=0 (i. e., at t=0, (x0,y0)=(0,r)) and subsequently moves with constant ω. express your answer in terms of r, ω, t, and unit vectors i^ and j^.

Explanation:

Let say the particle starts in counterclockwise direction with constant angular speed

so the angle turned by the particle after some time is given as

now the x and y components of the position of the particle is given as

now we know that it starts in counter clockwise direction so we will have position vector given as

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.