Steve4Physics's latest activity
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SOh wow, I just realised, we let this thread drag on 104 messages... feels like it was only 10 messages long like 2 seconds ago :cry:.
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SSteve4Physics replied to the thread Geometry: Similar Shapes.It's already posted! See diagram in Post #91.
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SSteve4Physics replied to the thread Geometry: Similar Shapes.Well done! I hope you drew diagrams: For those who don’t know, the UK GCSE exam' determines the ability/attainment-level of students...
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SThanks a lot guys. I got there in the end, thanks to all of you, and a bit of extra help from Maths is Fun. (Flip AEB on its head, as...
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SSteve4Physics replied to the thread Flux through a cylindrical surface enclosing part of a sphere.Check you have not mis-read the question - note that ##r = \frac 45 R## in option A. That's not correct. If you draw a diagram...
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SSteve4Physics reacted to Orodruin's post in the thread Flux through a cylindrical surface enclosing part of a sphere with
Agree.
Hint: You don’t need to compute the flux integral. Edit: with the dimensions of A, the cylinder does not completely enclose the sphere... -
SSteve4Physics replied to the thread Geometry: Similar Shapes.I think the best approach for a student at this level is to draw two diagrams corresponding to the two possible solutions. One diagram...
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SYou haven't got yourself in a muddle, it is a trick question and you are in a muddle because you haven't spotted the trick. I'm not...
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SSteve4Physics replied to the thread Geometry: Similar Shapes.@paulb203, if you are still struggling, you have probably hit a bit of a mental block. Here’s an extra problem to try which should...
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SSteve4Physics replied to the thread Intersection of a circle and a sine curve.I'll give it a go... What is the maximum number of times (##N## ) a circle* can intersect the graph of ##y=\sin x##? a)##N \le 2## b)...
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SSteve4Physics replied to the thread Rethinking Physics Education.Sorry to be negative but... The video has the ground moving left (watch the road-markings and the purple bushes in the background) as...
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SSteve4Physics replied to the thread Slight Confusion in Introductory Mechanics (Dynamics Problem).@Lunar Manatee, note that the SI symbol for the second is 's' not 'sec', so 'm/sec' is incorrect. EDITed to remove surplus information.
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SSteve4Physics reacted to PeroK's post in the thread Slight Confusion in Introductory Mechanics (Dynamics Problem) with Agree.
IMO, the question is a mess. Vectors and the magnitude of Vectors are horribly mixed up.
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SSteve4Physics replied to the thread Equilibrium Position of a Hanging Candy Cane.α was 2π - θ, i.e. the angle needed to achieve the required orientation by rotating the cane anticlockwise about P (to allow the...
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SSteve4Physics replied to the thread Equilibrium Position of a Hanging Candy Cane.FWIW here's a (quite short) solution using the 2D rotation matrix – or rather just its first row for transforming the x-coordinate...
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