00:02
In this problem, the force is given as 3 icap plus 4 j cap newton and the object is moving along the path 4y plus kx equals 3.
00:21
So from this we can write y is given by minus of k over 4 times x plus 3 or dy can be written as minus of k over 4 d x.
00:34
Let's say this has equation 1.
00:37
Now, elementary vector dr can be written as dx, i, cap, plus d .y, j cap.
00:47
Or from equation 1, the dr vector can be written as dx, i cap, minus k over 4, dx, j cap.
00:59
This is the elementary vector, dr...