Finding g from freefall - Required Practical - A-level Physics

scienceshorts.net Watch me do it for reals: • Determination of g by ... -
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[@azm1851]

Such a great teacher! Thank god you exist !

[@EdUnleashed1]

Just the experiment I needed, thanks!

[@ScienceShorts]

Watch me do it for reals: czcams.com/video/ri8YdBuNpsE/video.html

[@joshvir262]

Loving the videos

[@michaelhunt2222]

This is very useful thank you!

[@spirosgrivas7848]

Great! Thank you!

[@the_hasnat]

why not just use a ball bearing?

[@uniqueunonymous1055]

ayye bro i want aan a in a level physics cie .plz tell me what to you dont have full course for cie

[@st.angelone018]

You crazy bro

[@ScienceShorts]

I am?!

[@st.angelone018]

@@ScienceShorts haha 😂😂 in a good way btw. Much love from Spain 🔥

[@naheemahakinwale8403]

Why is uncertainty 1/2 the length of the card? So what if we took the top as the reference point?

[@zainismail7703]

So you got thr answer yet?

[@benasbarciauskas3322]

@@zainismail7703 its's because he's measuring the middle of the card as the card still accelerates as it's falling making it a happy medium to take a measurement from (therefore inducing uncertainty)

[@zainismail7703]

@@benasbarciauskas3322 tests finished last week but thanks.

[@benasbarciauskas3322]

@Zain Ismail did it come up?

[@boss4078]

Hey can someone explain to me this percentage uncertainty and why it is e.g. half the range. (I don't get it). The % un in V. (I don't get).

[@sandunigunawardena5570]

For a single reading Uncertainty is ( precision ÷ 2 )
If we take multiple readings, Absolute Uncertainty = (Range ÷ 2)
Percentage uncertainty = ( [absolute uncertainty ÷ avarage reading] × 100%] )
Percentage difference = ( [difference between the standard value and experimental value] ÷ standard value × 100% )

[@sandunigunawardena5570]

Speacil case
When using a metre rule to record the uncertainty of the reading, there is an uncertainty of the reading at both ends if the object. So the total uncertainty of the reading is the addition of uncertainties at the 2 ends.
Uncertainty of metre rule = 0.5 + 0.5 = (plus or minus) 1mm

[@sandunigunawardena5570]

Hope this will help you :)

[@beatek3912]

@@sandunigunawardena5570 the special case you mentioned is called a zero error. may be worth mentioning that every apparatus the you need to manually "match" the zero to your measurement contains a 0 error

[@Username-ww2cd]

Why is the uncertainty of v² double that of v instead of it squared?

[@Sama-eq8dp]

you always times the uncertainty by the power being raised. So t^2 will have an uncertainty *2, length ^3 (volume) will have uncertainty*3.

[@Username-ww2cd]

Sama Thank you!

[@jamesrobbins1296]

Smart gang where u at?

[@amin1991]

Not here

[@YesIlikebananasSo]

Definitely not here

[@gateau3144]

ur hands are hot

[@farzanamughal5933]

down bad