Determining 'g' Using a Free-Fall Method - PRACTICAL - A Level Physics

In this video I go through an AQA Physics A Level Required Practical that uses a free-fall method experiment to calculate the acceleration due to gravity, g. (This is AQA Required Practical 3.) This is also the OCR A Level Physics PAG 1.1 Practical.

Dropping a steel ball bearing through light gates can be used to find the acceleration due to gravity. Recording the time taken for it to fall as you then change the distance between the gates allows a graph to be plotted and the value of 'g' to be determined.

Thanks for watching,

Lewis

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[外人です-xu]

Me: Gotta do the experiment to get to the accurate value of g.
Systematic and Random Errors: Nope

[subscriberswithoutanyvid-ronr]

Can you upload all the core practicals and excess ones for the new specifications please?

[Mking]

never thought id need this video for university too

[NafSlaveOfAllaah]

Bismillah and Alhamdulillah
As Salaam alaikum brothers and sisters ❤!

[letslearnwithrahatfatima]

i didnot understand the part where u wrote 2u, please clarify.

[ravi]

Can you upload videos of all the practicals required for AS Physics pls!!

[kienang]

I suppose the function of each light gate is to measure the velocity, the first one is used for measuring the initial and the second one is for final velocity, then we use v^2=u^2 + 2aS to find the acceleration.

[crazyhq]

You can hear all the flat earthers scream in pain.

[rayhanulchowdhury]

What one advantage and disadvantage of making the distance between the light gate as large as possible?

[thecodinglad]

Could we use the equation v = u + at to plot the graph?

[umuthalil]

is there any sources of error that might occur during this experiment

[fahrenheit]

Is this similar to how we got the value of 9.806... for g on Earth? Or did that come about in a completely different way?

[amitjagtiani]

When reading off gradients and y-intercepts from graphs, how many sig figs/decimals places can I quote my answer to ?

[stephengevanni]

Thanks for this video; much appreciated sir. I have a question: you mentioned using a cube is better than a sphere, why is that?

[ebukaz]

What is g for no initial velocity for a object that just falls and for a object that's thrown up into the air with an initial velocity upwards in free fall?

[milesblack]

How do you know u tho, as the cube will have accelerated before passing through the first light gate?

[rand]

Why should x be constant in this experiment?

[jiaqima]

there's a mistake in the video, notice that in the equation '2S/t=2u+at' t cannot equal 0, so in the graph, u should plot it out.

[r.umarskhan]

Does it matter at what velocity the object emters the first light gate?

[tanishabanerjee]

I have a question about the significance of u, if the ball is being dropped, won't it have 0 initial velocity, or do we take the initial speed of when it passes the first light gate?