Investigating Terminal Velocity - OCR PAG 1.2 PRACTICAL - A Level Physics

In this video I go through an OCR Physics A Level Required Practical that uses a ball bearing and a viscous liquid to investigate terminal velocity. (This is the OCR PAG 1.2 practical.)
There are a lot of ways to investigate the terminal velocity of an object moving through a fluid. You can drop paper cupcake cases, or in this example a ball bearing through bubble bath. The exact set up varies with the equipment at your school, but in this video I explain how you can use video to record the data which is then analysed.
All Year 12 OCR Required Practicals can be found at:
www.alevelphysicsonline.com/y...
Thanks for watching,
Lewis
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[@johnkamitsuka4871]

I have been looking for a cheap, non-messy liquid for this practical. Thanks for that!

[@alanaswain264]

Could you please make videos for the rest of a-level practicals. Thanks :)

[@nyainadarlene]

Thanks so much I have been looking for a cheap explanation 💜

[@PikaPluff]

Great stuff! We have just finished this practical last week. Will you be doing more OCR practicals?

[@PhysicsOnline]

PikaPluff2040 Yep. Have a look on my website to see all the rest I did.

[@orzone4656]

So what would be the independent and dependent variables?

[@shubhangisurse301]

Which ball (material) you have used?

[@jasrajsingh8840]

Where can I get some results

[@aru0066]

Ohh so this is what my teacher wanted to say😂

[@LukeHaslerMusic]

When we did this PAG our teacher wouldn't give any advice and we didn't have much time so we rushed into the experiment without thinking. The tubes were about a metre tall and so dropping the ball bearing in was difficult. This meant we dropped it from the air into the washing up liquid and so all of our results indicated that the ball bearing had decelerated despite gravity. Don't ya love it when your PAG just fails?!

[@PhysicsOnline]

Have a look here for some more PAG advice www.alevelphysicsonline.com/year-12-ocr-practicals

[@willk9847]

this experiment is to measure terminal velocity so it doesn't matter if the ball bearing accelerated or decelerated before achieving terminal velocity

[@bobfrediii2131]

How do you get velocity from speed and time

[@ethanguest3438]

You can work out the displacement by rearranging the speed equation to get distance. And as velocity is displacement/time and you already have the time you can find it that way.
At least that is how I have been taught but don't entirely take my word for it

[@aru0066]

You can not
As Speed is a competitor of velocity
It is seen when distance (the actual path length is measure)

[@Alfster18]

Why a viscous fluid? Looks like that reached terminal velocity almost instantly? Would air or water not work better?

[@aru0066]

Good question
But Air and water have less viscosity so they Apply lesser viscous force and they will not appear to achieve terminal speed!

[@PikaPluff]

Also, what are edufects?

[@PhysicsOnline]

PikaPluff2040 Edge effects. Due to the influence of the side of the tube on the liquid.