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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?

Emma

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

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.

Emma

how do you pass an ISA

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

Emma