Exam Hack | CIE AS Physics | Structured | Force~Energy Question

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Force~Energy Worksheet: drive.google.com/file/d/1OJq1...
Force~Energy Answers: drive.google.com/file/d/1z4ZQ...
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Time Stamps:
0:00 Worksheet - Force~Energy
01:24 Theory - Force~Energy
06:47 Exam Question - 1
16:43 Exam Question - 2
23:46 Exam Question - 3
30:23 Philosophy - Observation is Learning

[@Intuitive_education]

Exam Hack Series | CIE A-level Physics | Structured (Paper 4) : www.patreon.com/itsintuitive

[@etcetera1674]

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[@evildave8111]

just in case someone sees this, i hope it isnt explained in the later parts + this is a year late, how it was explained to me by my physics teacher (also Cambridge) that it depends of the s.f. used in the question. so if u get the values 1.23 and 732 for example, u would use 3 s.f. in your answer, but only the answer thankfully, in the working out stage u can use whatever (tho i prefer to round as little as possible to avoid a rounding error)

[@victorwilson5582]

And I appreciate the philosophy of the video. To observe is to truly learn.

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Hey its been one month since i took physics AS and im giving the exam in october november of the same year.. i only have around 20 days to sit for my exam (paper 2) do you think i could try to aim for a B despite only having 1.5 months worth of practice.

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[@Intuitive_education]

Instagram I respond all the time on there

[@devanshtolani3703]

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[@joshuamukwemba4928]

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[@absarahmad6363]

see description

[@gordonchiew7341]

At 15:00, I don't see how increasing velocity increases the amount of work done. The distance remains the same but it's just being travelled quicker.

[@Intuitive_education]

The displacement doesn’t stay the same though? At different points in time the displacement of the trolley will be different (it would’ve increased) because it’s moved further down the slope from its original position X. The work done by F at point Y will be the same yes but the work done by F will be different at different points on the slope right? Does that make sense?

[@Intuitive_education]

And then the increase in work done isn’t linear because its accelerating (thus the rate of change in displacement is increasing) hence the increase in the gradient of the line.

[@gordonchiew7341]

@@Intuitive_education The work done at point Y will be the same? Also I can see how power would increase if velocity increases. Shouldn't we calculate the work done by taking the total distance travelled and multiplying that by the force?

[@Intuitive_education]

@@gordonchiew7341 Yes work done at Y is a single value and will stay the same. But over the motion from X to Y the distance is increasing as time passes, so the work done is increasing. I'm struggling to understand what's confusing you? I'm probably just not explaining it very well over message.

[@gordonchiew7341]

@@Intuitive_education Ah it makes sense, but I just can't grasp how velocity would increase the work done. In my mind, you are traveling the same displacement. Work done is defined as force*distance. I was thinking it doesn't matter how much velocity is increasing, as long as force and distance is not effected, neither will the work done be.