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# M1 connected particles help watch

1. can you help with this connected particles question
its from 2001 paper and i am confused on part a) ive been trying for an hour but cant get the answer
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2. (Original post by djmans)
can you help with this connected particles question
its from 2001 paper and i am confused on part a) ive been trying for an hour but cant get the answer
consider F = ma starting with a good diagram
3. (Original post by TeeEm)
consider F = ma starting with a good diagram
F doesn't equal ma; it equals ma/sqrt(1-v^2/c^2), as shown by Einstein.
4. (Original post by constellarknight)
F doesn't equal ma; it equals ma/sqrt(1-v^2/c^2), as shown by Einstein.
5. Very nice of you to admit that. The first step to accepting mediocrity is realising it...
6. (Original post by constellarknight)
F doesn't equal ma; it equals ma/sqrt(1-v^2/c^2), as shown by Einstein.
Since the addition of relativistic effects will not increase the precision of our answer by anything significant relative to the precision by which we know (g), which is 3 sig figs in M1 Edexcel, therefore the square root is redundant and redundancy is the devil in physics and mathematics. So F=MA unless V is high enough or (g) is known to a high enough precision.
7. g is defined by standard to be 9.80665 m/s^2. If Edexcel say something different then write in and complain.

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