• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Few questions about few units

  • Thread starter XuryaX
  • Start date
6
0
I am studying in Grade XI and have started with physics. Its very different from physics in last grade. So here are my questions about few units my tution teacher challenged everyone about.
1. Homework Statement
i)What is the name of the unit
[tex][Kg][Meter][Second]^{-3}[/tex]

ii) What is [tex]|Acceleration|[/tex]

2. Homework Equations
i) By doing dimensional analysis we get [tex][M][L][T]^{-3}[/tex] , we may also call this Force/Time. Couldn't find anything bout this unit.

ii)
[tex]|Vector| = Scalar[/tex]
[tex]|Displacement|=Distance[/tex]
[tex]|Velocity|=Speed[/tex]
[tex]|Acceleration| =?[/tex]

3. The Attempt at a Solution

The above is my try, couldn't do anything further.

Thanks for help.

-XuryaX
 
Last edited:

Redbelly98

Staff Emeritus
Science Advisor
Homework Helper
12,038
127
Welcome to PF.

(i) Looks right. (Are you sure it isn't second-2 ?)

(ii) Acceleration involves something changing ... if you look in your text book, it should have a discussion and an equation or two for acceleration.
 
6
0
Actually, i just need the name of the physical quantity
MLT-2 is force but is there a name for force/time?

And the Scalar quantity of velocity is called speed, what is the scalar quantity of acceleration?
though we in general use acceleration as ther term in our daily lives.
 
671
2
Actually, i just need the name of the physical quantity
MLT-2 is force but is there a name for force/time?

And the Scalar quantity of velocity is called speed, what is the scalar quantity of acceleration?
though we in general use acceleration as ther term in our daily lives.
Well, I'm only speaking for myself, but I've never encountered any specific names for these.

The quantity you described in (i) could be the change in force over time. Again, there's no name I've ever encountered for this, since this isn't something of much interest to name.
The change in force over time.

As for the scalar quantity of acceleration, if I wanted to get my point across, I'd call it the change in the speed, that's unambiguous enough.
 

Redbelly98

Staff Emeritus
Science Advisor
Homework Helper
12,038
127
Well, these are rather weird questions. I don't know of any single unit name for force/time. Perhaps they mean for you to take the common metric unit of force (which is ____?) and divided it by seconds.

I missed the "absolute value" sign before. I'm not aware of any term associated with |a|.
 

Related Threads for: Few questions about few units

  • Posted
Replies
3
Views
1K
Replies
3
Views
2K
Replies
9
Views
2K
Replies
4
Views
1K
Replies
5
Views
5K
  • Posted
Replies
1
Views
894
  • Posted
Replies
2
Views
1K
  • Posted
Replies
1
Views
880

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top