A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. if the book ends up its initial postion.what is the...

The dimension of the table = 1m by 3m. Assume the table a rectangular (or parallelogram rarely)

Therefore, the length of the perimeter of the table = 2(length+breadth)=2(1+3)=8meter

Therefore the distance travelled by the book by its travellin onc along the perimeter and coming back to the starting point = 8meter.

But the displacement of the book considering its directions is =3m along the length +1m along the width direction -3m along the length and -1m along the width = 0, as the book is is at the starting postion only after all its travel.