Question

What is the total displacement of a dog that runs north 80 meters to chase a ball, returns to its master, and then runs south 20 meters?

Answer 1

Answer:

The total displacement of a dog is 100 m.

Explanation:

Given that,

A dog that runs north 80 meters to chase a ball, returns to its master, and then runs south 20 meters.

We can define the displacement as the distance between the initial position and final position of the object.

The displacement is defined as,

$D = P_{f}-P_{i}$

Put the value into the formula

$D = 20-(-80)$

$D = 100\ m$

Hence, The total displacement of a dog is 100 m.

Answer 2

80+20 is 100
you would not count the part where the dog runs back to its master
so its 100 meters