Answer:
The total distance traveled by Zak is 250 m and total displacement is
70 m
Explanation:
<u><em>Distance</em></u> is a scalar quantity that represents how much ground an
object has covered during its motion
<u><em>Displacement</em></u> is a vector quantity that represents how far out of place
an object is, means the change in its position
Displacement = final position - initial position
The straight track is 100 m
Zak runs to the 80 m mark
That means he runs forward from zero to 80
Then his distance = 80 m
His displacement = + 80 m
He then runs back to the 20 m
That means that he runs back from 80 m to 20 m
Then his distance = 80 - 20 = 60 m
His displacement = 20 - 80 = -60 m
He then runs to the 100 m mark
That means he runs forward from 20 m to 100 m
Then his distance = 100 - 20 = 80 m
His displacement = 100 - 20 = + 80 m
Finally he runs to the 70 m mark
That means he runs back from 100 m to 70 m
Then his distance = 100 - 70 = 30 m
His displacement = 70 - 100 = - 30 m
His total distance is the sum of all distances he runs
The total distance = 80 + 60 + 80 + 30 = 250 m
His total displacements is the sum of all displacements he runs
The total displacement = (+80) + (-60) + (+80) + (-30) = + 70 m
<em>The total distance traveled by Zak is 250 m and total displacement is</em>
<em>70 m</em>
