Displacement Physics Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
A person walks 4 m4 \text{ m} east and then 3 m3 \text{ m} north. What is the total distance traveled and the displacement?

Solution

  1. 1
    Total distance traveled is the sum of path lengths: d=4+3=7 md = 4 + 3 = 7 \text{ m}.
  2. 2
    Displacement is the straight-line distance from start to finish: d=42+32=16+9=25=5 m|\vec{d}| = \sqrt{4^2 + 3^2} = \sqrt{16 + 9} = \sqrt{25} = 5 \text{ m}
  3. 3
    Direction: θ=tan1(34)36.9°\theta = \tan^{-1}\left(\frac{3}{4}\right) \approx 36.9° north of east.

Answer

Distance=7 m,Displacement=5 m at 36.9° N of E\text{Distance} = 7 \text{ m}, \quad \text{Displacement} = 5 \text{ m at } 36.9° \text{ N of E}
Displacement is a vector quantity measuring the shortest path from start to end point, while distance is the total path length traveled. They differ whenever the path is not a straight line.

About Displacement

The change in position of an object, measured as the straight-line distance and direction from the starting point to the ending point.

Learn more about Displacement →

More Displacement Examples