A2L Item 158

• Description: Indicate the total displacement after a series of displacements.
• Goal: Hone the concept of displacement
• Source: CT151.2-2
• Keywords: Displacement, Mechanics

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The question for students:

Bekki walks 3 m to the right, 4 m to the left, 5 m to the right, and 2 m to the left. What is her displacement?

1. 0 m
2. 2 m
3. 2 m (to the right)
4. 2 m (to the left)
5. 14 m (to the right)
6. 8 m to the right and 6 m to the left
7. impossible to determine
8. none of the above

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Commentary for teachers:

Answer

(3) Students need to distinguish between distance and displacement. Questions such as this are good introductions to vectors.

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