Ashley decides to go for a walk. She walks 5 blocks west, 2 blocks south, 5 blocks east and finally 2 blocks north. What is her total displacement?

Respuesta :

She's back at her starting position

Answer: The total displacment is zero.

Explanation: the total displacement is the difference in positions. You can verify that Ashley ends in the same place where she started.

This sketch will help you to see that:

      5 blocks
      →→→→→
   ↑               ↓
   ↑               ↓ 2 blocks
     ←←←←←     
       5 blocks
 
Then, the position of Ashley at the end of her walk is the same that when she started leading to a nil displacement.