Original post by penny212
what does it mean when it says Taking ← as positive Deceleration = α
that does this mean and imply?
that does this mean and imply?
What do you interpret it as? It describes a positive direction.
I can guess the question, but care to give any more information?
(edited 2 years ago)
Original post by mqb2766
What do you interpret it as? It describes a positive direction.
I can guess the question, but care to give any more information?
I can guess the question, but care to give any more information?
why do they do that why not make front postive
Original post by penny212
why do they do that why not make front postive
Are we playing guess the question?
Should you take up or down as positive? It doesn't matter in the end, but you have to choose a direction as being positive in your working.
(edited 2 years ago)
Original post by penny212
why do they do that why not make front postive
Arrows are pretty normal tool used in mechanics to denote the direction of a vector.
TBH often in complex systems you can have many different bodies or fluids moving with different magnitudes & directions, arrows are pretty universally understood.
Original post by penny212
why do they do that why not make front postive
Generally speaking, if you have several forces acting on a system it will usually either make sense to choose the positive direction as the one in which motion is taking place (or in which deceleration is taking place if the forces are opposing motion), or alternatively with lots of forces choose the direction in which the majority of forces are acting. That way, you end up with fewer negative signs involved, and consequently less danger of silly errors in your working out.
Original post by davros
Generally speaking, if you have several forces acting on a system it will usually either make sense to choose the positive direction as the one in which motion is taking place (or in which deceleration is taking place if the forces are opposing motion), or alternatively with lots of forces choose the direction in which the majority of forces are acting. That way, you end up with fewer negative signs involved, and consequently less danger of silly errors in your working out.
that explains it thanks, main reason is to get less negative values mainly when its a deceleration
Quick Reply
Related discussions
- A Level maths paper 3
- should i give up?
- Oxford brookes or sussex for engineering
- University of Birmingham - The School of Engineering Mathematics Aptitude Test
- just moved into uk curriculum from American..starting year 12 super confused
- What topic are you on at school in Further maths yr 12?
- Bristol offers
- Arkwright Scholarship 2024 Y11s
- y13 - growing my grades , jack and the beanstalk ver
- Post exam blues
- nottingham for mechanical engineering?
- Further Maths or Physics A Level
- year 12 study journal!
- Balfour Beatty Graduate Scheme 2024
- OCR A-level Mathematics A Paper 3 (H240/03) - 20th June 2023 [Exam Chat]
- Ucl offer?
- imperial clearing
- Jacobs Graduate Scheme 2024
- what uni to firm for mech eng?
- A- level opinions
Latest
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
