Question

David walks 3 km north, and then turns south and walks 4 km.
What’s the distance and displacement?

Answer 1

Explanation:

Distance is the length of the path.

d = 3 km + 4 km

d = 7 km

Displacement is the difference between the final position and initial position.

x = 3 km + (-4 km)

x = -1 km

x = 1 km south

Answer 2

The distance will be "7 km" and displacement be "1 km (south)".

Distance and Displacement:

Distance would be a scalar number that describes "that however much ground an item had also adequately covered" while moving.

Displacement would be a vector variable which thus describes "just how out of placement of an item represents"; everything just reflects the amount change throughout the position of the object.

According to the question,

David walk,

• 3 km (north), then
• 4 km (south)

Now,

The distance (d) be:

= $3+4$

= $7$ km

and,

The displacement (x) be:

= $3+(-4)$

= $3-4$

= $-1$ km i.e.., $1$ km (south)

Thus the response above are correct.

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