A mechanics question about work and vectors

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Homework Help Overview

The discussion revolves around a mechanics question involving vectors and work, specifically focusing on finding the angle between a constant force and the displacement of an object.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore how to relate the force and displacement vectors to determine the angle between them, with one participant questioning the use of the dot product in this context.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the relationship between vectors and angles. Some guidance on the dot product has been introduced, but no consensus or resolution has been reached yet.

Contextual Notes

The original poster expresses uncertainty due to their newness to physics, indicating a potential gap in foundational understanding that may affect their approach to the problem.

iwsdw
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this year i started studying physics, so this question might be easy but i couldn't do it... i'll be happy if you help me.

''A constant force (5N)i-7(N)j is applied on an object and it moves. The total displacement of the object is l=(3)i+(6)j+(3)k. Find the angle between the force and the displacement.''
 
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What specifically do you need help (or are having trouble) with? Please elaborate.
 
I don't know how to find the angle. How can I use the displacement information to find the angle?
 
How is the dot product of two vectors related to the angle between them?
 
Ah yes! Thank you very much. ^^
 

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