Edexcel Mechanics 1Watch
Luckily i had done two of the EXACT same questions, 4 and 8, for revision, so i just wrote it down for tonnes of easy marks.
Sorry, i cant remember which is which.
also that question about the diver 5 metres above wat? from the springboard or from where she jumps.... some of the questions were badly phrased in my opinion!
Basically you were told the train overtook after they'd reached maximum speeds. So you took the distances travelled whilst accelerating, and calculated the distance moved up to the overtaking point. Basically by putting their distances equal you are working out at what distance they overtook, and stuff. I can't explain it now, but 98 works out fine
the working was
30(12)(0.5) + 52(30) + 30T = 60(24)(0.5) + 60T
180 + 1560 +30T = 720 +60T
1020 = 30T
However as in this model I have taken the value of T beginning at 64 seconds
34 + 64 = 98
(however as i managed to write down in the actual exam 64 + 34 = 100)
luckily, grade boundaries are lower than in pure or stats,