How do I pass an ISA in GCSE science

I have already failed two and another one is coming up soon can you help me?

Sher

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Answers

How did you fail the first two? Were you given reasons?

ianmoth

29 November 2011

I failed the first one because of the written exam, I passed the practical so I am okay with that, and no I wasnt given any reasons I have a feeling its because I just have a lack of understanding with everything involving the written exam.

wpgambino

30 November 2011

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Help with approximation first/second derivative velocity/accel

I have a table of values for a projectile moving away from a radar station. My first column is the time (t) of 0 to 60 with time steps of 4. I then have a distance(km) of the projectile from the radar station followed by the angle(radians) of the projectile to the radar station.

The distance obviously increases by time along with a lowering of the angle of the projectile to the radar station.

I need to write a program which will work out the magnitude of velocity and acceleration for each time step (each 4 seconds upto 60) as the projectile moves away. I am confused how to do this because I am unsure how to approximate the derivatives. I can give further data and formulas if required. The program is the easy bit but I just don't know how to get the write answers into Excel first so I can work out how to program it correctly.

Ossama

how do you pass an ISA

The question paper and experiment don't seem to link?

Keloli