The only thing I got right was equating gravitational potential energy to kinetic energy, but like most students, I failed at finding out the height...but your explanation/diagram made a lot easier to visualize and understand the problem! In the end, the calculations were quite simple, but the interpretation was the tricky part for me...thanks a lot! 🙏🏻
at 4:18 I'm not sure if the question is worded clearly enough. "the separation is 1/8th of the circumference". You interpreted "the separation" to be referring to the angle of separation relative to the circle's centre. I interpreted "the separation" to mean the distance between the masses. So I did (3.4*2*pi/8) = (17pi)/20 (is approx 2.67m) and labelled the thick black line on the diagram as being 2.67m long. Taking my interpretation further i ended up with the angle actually being 46.246degreees instead of your 45. Is my interpretation of the meaning of "the separation" fair? Or would you say it's clear that what they meant by separation is the angle between the masses, not the distance between the masses.
chatGPT made the same decision as me. But it then went on to multiple the total GPE by 2 bc there are 2 masses which is obvs wrong due to one of the masses having a relative gpe of 0. So maybe its not the most reliable source XD
I interpreted "1/8th of a circumference" as the arc length between the two masses and not the length of the rod itself which would also (obviously) give an angle of 45 degrees. But I do agree that the wording is not the clearest thing ever.
@@NerdyAnas Thanks for sharing. I didn't consider that 1/8 of the circumference could refer to the circumference of the circle that they were sat on. Makes more sense now
Any of that a-level physics class not taking maths a-level? Because I can only imagine that any competent person with a decent gcse maths grade would find this trivially easy.
What an excellent question. I think I will add that to my baseline test for new year 12s.
You should - it really tests the application of what they know to a completely new situation.
The only thing I got right was equating gravitational potential energy to kinetic energy, but like most students, I failed at finding out the height...but your explanation/diagram made a lot easier to visualize and understand the problem! In the end, the calculations were quite simple, but the interpretation was the tricky part for me...thanks a lot! 🙏🏻
at 4:18 I'm not sure if the question is worded clearly enough. "the separation is 1/8th of the circumference". You interpreted "the separation" to be referring to the angle of separation relative to the circle's centre. I interpreted "the separation" to mean the distance between the masses. So I did (3.4*2*pi/8) = (17pi)/20 (is approx 2.67m) and labelled the thick black line on the diagram as being 2.67m long.
Taking my interpretation further i ended up with the angle actually being 46.246degreees instead of your 45.
Is my interpretation of the meaning of "the separation" fair? Or would you say it's clear that what they meant by separation is the angle between the masses, not the distance between the masses.
chatGPT made the same decision as me. But it then went on to multiple the total GPE by 2 bc there are 2 masses which is obvs wrong due to one of the masses having a relative gpe of 0. So maybe its not the most reliable source XD
I interpreted "1/8th of a circumference" as the arc length between the two masses and not the length of the rod itself which would also (obviously) give an angle of 45 degrees. But I do agree that the wording is not the clearest thing ever.
@@NerdyAnas Thanks for sharing. I didn't consider that 1/8 of the circumference could refer to the circumference of the circle that they were sat on. Makes more sense now
I thought exactly the same, that separation meant linear distance between the masses.
Agreed. I think the reason such a high percentage of students get this wrong is because of the wording.
the idea of 2 mass in kinetic energy would be of me where i would of be confused other wise its a great question
Any of that a-level physics class not taking maths a-level? Because I can only imagine that any competent person with a decent gcse maths grade would find this trivially easy.
I got an 8 in GCSE and I struggled with this. everyone is different
Why do 70% of people get this wrong? What mistake do they make exactly?