The displacement of the hamster ball is -5 feet.
Recall that the displacement has to do with the distance that is covered in a specified direction. The difference between the distance and the displacement is that the distance is a vector quantity and the displacement is a vector quantity.
Indeed all the quantities in physics could be divided into vector quantities and scalar quantities. The vector quantities have both magnitude and direction while the scalar quantities have only magnitude but does not have direction. The vectors are know to be shown by the use of a bold face that is written over the vector and indication of direction via an arrow.
We can see that in this case, a hamster in a ball begins its journey 5 feet to the left of a refrigerator, travels 20 feet to the right of the refrigerator, and ends its journey directly in front of the refrigerator.
This implies that the displacement of the hamster ball is -5 feet.
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