i made the ratios of the masses into 7:5:2 but was the cone solid? or hollow? because i see you have a h/3 and isnt that for a hollow cone? ? ? was that **** hollow are you serious.

Original post by ilazakristudent

Height of the cone is 100% 9h/8.

(3h/4)(M+(2M/5))=(M)(h/2)+(2M/5)(h+H/3), where H is the height of the cone.

Reply 46

supalape

OP

13

Original post by dalliant

i made the ratios of the masses into 7:5:2 but was the cone solid? or hollow? because i see you have a h/3 and isnt that for a hollow cone? ? ? was that **** hollow are you serious.

It was hollow my guy sorry lol

Reply 47

ilazakristudent

5

Hollow bro :s-smilie:

. My maths teacher was right, the highest scorers make the least silly mistakes, it's literally down to these type of mistakes.

Original post by dalliant

i made the ratios of the masses into 7:5:2 but was the cone solid? or hollow? because i see you have a h/3 and isnt that for a hollow cone? ? ? was that **** hollow are you serious.

This is for resits, right?

I have added this thread to the exam index under resits so people can easily find it.

Best of luck for your remaining exams.

Reply 49

TheBigBrick

8

Okay so was the final part about the time for 0.4m of the SHM question worth 7?

I didn’t realise to divide by S at the end of it, and I also somehow used the amplitude as 0.5 rather than 0.8, but my SHM equation was correct, and my working out was all correct for the amplitude I used. How much do people think these errors will be penalised?

Reply 50

dalliant

5

ok listen up. the ticks are the correct answers and the crosses are what i put. if only one character is wrong in each one, and that's everything. how many marks are we looking at. i want to set myself on fire.

Reply 51

ilazakristudent

5

The first one you ticked is still wrong i think.The reason why you did 1cos10 is because of the way you thought everything was lined up, the same reason you did sine. So instead, it would just be 1-3tan10, because the distances 3tan10 aswell as 1, are both perpendicular to the plane face.

Original post by dalliant

ok listen up. the ticks are the correct answers and the crosses are what i put. if only one character is wrong in each one, and that's everything. how many marks are we looking at. i want to set myself on fire.

Reply 52

dalliant

5

after some more devastating news, i repose my question, how many marks my guy

Original post by ilazakristudent

The first one you ticked is still wrong i think.The reason why you did 1cos10 is because of the way you thought everything was lined up, the same reason you did sine. So instead, it would just be 1-3tan10, because the distances 3tan10 aswell as 1, are both perpendicular to the plane face.

Reply 53

supalape

OP

13

Original post by dalliant

ok listen up. the ticks are the correct answers and the crosses are what i put. if only one character is wrong in each one, and that's everything. how many marks are we looking at. i want to set myself on fire.

If you assumed the cone to be solid instead of hollow I reckon you’d lose 2-3 marks, definitely one for the final answer. But I’m certain you’d get 1 mark for the COM of the other thing (forgot what shape it was now lmao)

Reply 54

ilazakristudent

5

None I guess, maybe 1 for the 6sin10

Original post by dalliant

after some more devastating news, i repose my question, how many marks my guy

Reply 55

dalliant

5

the whole thing was 4 marks tho. one for final answer and one for the error i reckon? but what about the other one. they were both worth 4 marks so do u reckon i'd get 2 for method for each?

Original post by supalape

If you assumed the cone to be solid instead of hollow I reckon you’d lose 2-3 marks, definitely one for the final answer. But I’m certain you’d get 1 mark for the COM of the other thing (forgot what shape it was now lmao)

Reply 56

username3555092

14

Original post by ilazakristudent

The first one you ticked is still wrong i think.The reason why you did 1cos10 is because of the way you thought everything was lined up, the same reason you did sine. So instead, it would just be 1-3tan10, because the distances 3tan10 aswell as 1, are both perpendicular to the plane face.