Alevels PHYSICS PRACTICAL 34 Prediction.

[Shimmery woods]

Don't forget these free points I'm giving all of you easily score marks in the limitations and improvements section
1)
Limitation=Not enough readings to arrive at a firm conclusion
Improvement=Take more readings AND plot a graph
2)
Limitation=Friction at the pulley
improvement=Lubricate
3)
Limitation=Difficulty holding protractor straight while measuring
Improvement=Clamp the protractor
4)
(DISPUTED/UNSURE)
Limitation=Length/diameter/thickness of nail too small to measure OR not evenly distributed
Improvement= Use different apparatus such as micrometer to reduce uncertainty OR measure along the nail and average



There are many more points to think off but I'll it at this for now and don't forget to help others out cos that's what we stand for.

Thankyou so much!!

 

[DeadbeatCIE]

Ok guys we are arriving closer to D day so I sincerely urge everyone to contribute in these 24 hours. If you know anything tell it now

 

[Dukula Jayasinghe]

I hereby confirm no electricity for paper 34.

 

[DeadbeatCIE]

amina1300 we haven't heard from you in some time and considering you might have the most productive contribution. Help us out some more

 

[Dukula Jayasinghe]

It might be pulley question or projectiles or maybe mass balancing / osscilaions (center of gravity)

 

[Dukula Jayasinghe]

amina1300 did paper 33 as far as i can remember

 

[DeadbeatCIE]

amina1300 did paper 33 as far as i can remember

True that but she started this thread with the appropriate predictions and as skeptical as I was her p33 prediction was spot on and highly acclaimed by other candidates

 

[fardeen721000]

h

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PREDICTED QUESTIONS

have any similar questionin past papers like this ? that i could refer too ?

 

[fardeen721000]

This seems really helpful (if y'all know what I mean) I still don't get the nails in the second one and I assume this one is for angle measurement being the dependent and the load being the independent? For the first one where is the nail we have to measure the number of curves and is this by any chance a wave experiment for the first time? anyway this is REALLY helpful. See if this can be done for chemistry 34 too or at least the type of questions to be expected.

can you like give a brief explanation of whats happening in both experiments ?

 

[DeadbeatCIE]

can you like give a brief explanation of whats happening in both experiments ?

The First Question is possibly about spring extension and load or density
The Second Q might be about angle measurements between the load and pulley with different set of weights

 

[fardeen721000]

m

The First Question is possibly about spring extension and load or density
The Second Q might be about angle measurements between the load and pulley with different set of weights

my teacher just linked me with papers having the same type of questions as above
m17 33
s 16 33

 

[fardeen721000]

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PREDICTED QUESTIONS

any new updates for the predictions ?

 

[janedoe]

In physics the absolute error is equal to least count of the instrument?
And in stopwatch or mass balance do we multiply the absolute error by two?
Help would be greatly appreciated.

 

[janedoe]

In the following questions all lengths are measured with a metre rule with the same least count; so why are the values for absolute uncertainty different in the marking schemes?

 

[Farjad Ilyas]

In the following questions all lengths are measured with a metre rule with the same least count; so why are the values for absolute uncertainty different in the marking schemes?

Sometimes when you're taking a reading, the error isn't only due to the measuring instrument. For example, if you're measuring the height of a weight (from the table) suspeded from a spring, the weight bobs up and down a bit so you have to take that into account as well. That's why in different experiments, unless the measurement is straight forward, the absolute uncertainty is different and larger than the error of the instrument itself. The safest method to find percentage uncertainty in this case is to take repeated readings, calculate absolute uncertainty using Max-Min/2 and then calculating percentage uncertainty using Absolute uncertainty/ Mean of repeated readings x 100.

 

[janedoe]

Sometimes when you're taking a reading, the error isn't only due to the measuring instrument. For example, if you're measuring the height of a weight (from the table) suspeded from a spring, the weight bobs up and down a bit so you have to take that into account as well. That's why in different experiments, unless the measurement is straight forward, the absolute uncertainty is different and larger than the error of the instrument itself. The safest method to find percentage uncertainty in this case is to take repeated readings, calculate absolute uncertainty using Max-Min/2 and then calculating percentage uncertainty using Absolute uncertainty/ Mean of repeated readings x 100.

Ok got it. Thank you so much.

 

[DeadbeatCIE]

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PREDICTED QUESTIONS

Anything else we should know?
Is the second question apparatus useful for limitations and improvements?
Will the second question come as expected?

 

[farcefrace]

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PREDICTED QUESTIONS

Can someone please confirm these predictions and apparatus setup for tomorrow's 34 practical?

 

[ErosKuikel]

Errors And Limitations for this balancing type of practical?

 

[Omaima Uchiha]

m

my teacher just linked me with papers having the same type of questions as above
m17 33
s 16 33

Can you please share the links?