13. If we use plus and minus signs to indicate the directions of velocity and acceleration, then the object speed up, when.. * positive velocity and negative acceleration positive velocity and zero acceleration negative velocity and negative acceleration

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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## Question

**13. If we use plus and minus signs to indicate the directions of velocity and acceleration, then the object speeds up, when...**

- Positive velocity and negative acceleration
- Positive velocity and zero acceleration
- Negative velocity and negative acceleration
- None of them
- Negative velocity and positive acceleration

### Explanation

An object speeds up when the direction of velocity and acceleration are the same, either both positive or both negative. This allows the acceleration to increase the magnitude of velocity in that direction.
Transcribed Image Text:## Question **13. If we use plus and minus signs to indicate the directions of velocity and acceleration, then the object speeds up, when...** - Positive velocity and negative acceleration - Positive velocity and zero acceleration - Negative velocity and negative acceleration - None of them - Negative velocity and positive acceleration ### Explanation An object speeds up when the direction of velocity and acceleration are the same, either both positive or both negative. This allows the acceleration to increase the magnitude of velocity in that direction.
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