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# Assumptions Mechanics 1 AQA Watch

1. What are the most common assumptions that you can state with regards to forces?

I know these two:
- No air resistance
- Object is a particle

Are there usually anymore?

Thanks in advance and good luck tomorrow
What are the most common assumptions that you can state with regards to forces?

I know these two:
- No air resistance
- Object is a particle

Are there usually anymore?

Thanks in advance and good luck tomorrow
When I did M1 last year, the main modelling assumptions we used were:
-object is modelled as a particle
-no air resistance
-no wind
-unless otherwise stated, surfaces are smooth with no friction
-pulleys and string have no mass
-force due to gravity is constant
-Earth is modelled by a plane
-rods are uniform (weight is distributed evenly across length)

I think that's it
3. (Original post by 09craige)
When I did M1 last year, the main modelling assumptions we used were:
-object is modelled as a particle
-no air resistance
-no wind
-unless otherwise stated, surfaces are smooth with no friction
-pulleys and string have no mass
-force due to gravity is constant
-Earth is modelled by a plane
-rods are uniform (weight is distributed evenly across length)

I think that's it
Thank you that's exactly what I needed
Thank you that's exactly what I needed
That's okay, good luck!!
5. (Original post by 09craige)
That's okay, good luck!!
Thank you
Since you did it last year, do you have tips or key things I should remember for tomorrow because I'm slightly worried about the exam (I left revision a bit last minute oops)
6. Main thing is make sure you know all the suvat equations because they're going to come up and if you don't know them, it'll be difficult to answer and you could lose a lot of marks :s there's only five so if you don't know them, it's definitely not too late

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