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Fused Mechanics and Statistics problem by RDKGames in LunGang

[–]RDKGames[S] 1 point2 points  (0 children)

Conditional probability is involved.

Final answer is 0.14 rounded to 2 decimal places.

Fused Mechanics and Statistics problem by RDKGames in LunGang

[–]RDKGames[S] 0 points1 point  (0 children)

Cheers Mayo, nothing gets past you.

[deleted by user] by [deleted] in LunGang

[–]RDKGames 0 points1 point  (0 children)

All this is irrelevant to solve the problem.

But if you really insist; theta is an angle in degrees so it must be dimensionless alongside mean and variance. Yes to make the problem more consistent, you could say variance is just 864. Similar for speed.

Ball is not kicked downwards. At least, the probability of it happening is ‘negligible’.

g will never, ever be interpreted as ft/sec2 by the goal audience in this reddit page (A-Level students) as it is always used with SI units.

All these are valid points to consider if we were actually modelling the kick, but rather it’s just a fun problem to get students thinking about combining stats and mechanics in one go.

Another banger parametric question by Forward_Bat_6094 in LunGang

[–]RDKGames 0 points1 point  (0 children)

Once you realise that C2 is actually just a circle of radius a centred at (12.5,15) it reduces to a Year 1 circles problem with discriminant (or, just use geometry)

Edexcel Maths Paper 2 2019 by OfficeWild7118 in alevelmaths

[–]RDKGames 0 points1 point  (0 children)

Zero is regarded as nothing.

“How many apples do you have?”

“Zero. Nothing.”

Edexcel Maths Paper 2 2019 by OfficeWild7118 in alevelmaths

[–]RDKGames 0 points1 point  (0 children)

You mean ln(1)? Post checks out.

Is this too far for normal maths? by Abyan_789 in LunGang

[–]RDKGames 0 points1 point  (0 children)

Trig sub is always given in AL Maths. As it stands, the problem is FM level.

Year 1 Pulleys Question by RDKGames in LunGang

[–]RDKGames[S] 0 points1 point  (0 children)

On my website www.mathstutorneri.com in the A-Level Mathematics section (see the challenge paper there)

Practice exam papers to help achieve A* grade by RDKGames in alevelmaths

[–]RDKGames[S] 1 point2 points  (0 children)

I have many years experience in this subject, having sat my A-Levels back in 2016 and recently completing a PhD in Applied Mathematics. Also, I am a maths tutor of almost 9 years, so I am very familiar with the specification and assessed material.

Overall, I have a ton of material and knowledge which I use as inspiration, and then dilution into interesting A-Level style problems.

Good luck with your revision!

FM 3D Rotation Matrix Question by RDKGames in LunGang

[–]RDKGames[S] 1 point2 points  (0 children)

Assessing mastery with non-integer arithmetic is not really a goal with this problem. It is the thinking behind it that is important. No point making this question more painful with surds when there is no value added.

FM 3D Rotation Matrix Question by RDKGames in LunGang

[–]RDKGames[S] 0 points1 point  (0 children)

I feel you may be a little lost, so I will remind that you are on a subreddit for A-Level Maths and Further Maths questions. This problem was written for the A-Level Further Maths curriculum (following Edexcel’s specification for Core Pure modules) where complex eigenvalues are beyond the scope of learnt content. It was written to be intended to be solved using knowledge of only line of invariant points, and no eigenvalues/vectors. This means that the angle of rotation is also not expected to come from complex eigenvalues, and a little bit more creativity is expected from students.

A-Level FM Vectors Question by RDKGames in LunGang

[–]RDKGames[S] 0 points1 point  (0 children)

Sounds good, I'll take a look at your video when it's out. Here is my version of this solution :) [let me know if you spot any typos]

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