00:01
Vector is lying along the x -axis such that the tail of the vector is fixed it to the x -axis and the magnitude of the vector is found out to be 12 units.
00:09
So let's call this vector as a.
00:11
So the magnitude of the vector is 12 units.
00:15
Now this vector starts rotating in the anticlockwise direction.
00:20
So as it rotates in the anti -clockwise direction, so let's say initially it rotates by an angle, some angle theta in the plane of x and y, positive x, positive.
00:30
So i can say that on resolving i can see both the components would be present x and y components.
00:36
So x component is not zero.
00:38
Now let's say it has rotated by an angle of 90 degrees.
00:41
So this is the next position.
00:42
This is position one.
00:43
This is position two.
00:45
So i can see that now the vector is lying completely along the y axis.
00:49
So as it is lying completely along the y axis on rotating by 90 degree, the x component goes to 0 on rotating.
01:02
By 90 degree x component is equal to 0 as sector lies along y -axis...