Measuring Gravitational Acceleration (g) by Free-fall Method - A Level Physics Revision
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- เผยแพร่เมื่อ 13 ก.ย. 2024
- One of the core practicals for A Level Physics Mechanics. Measuring g by a free fall method. This method is using one of the equations of linear motion and measuring final velocity for a range of heights, and then plotting a graph. Also using a bit of algebra to resolve the graph into a straight line for more accurate analysis.
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This does not measure acceleration toward the Earth or Gravity. It’s simply measuring the speed of an object over time, moving in relation to your perception or position.
Accelerometers show and register zero in free fall, and their is zero displacement in free fall. Hence, no acceleration. Hence, no Gravity.
One question, how will the light gate know when to stop recording time? Would you start the timer up manually first on the computer?
how do i explain the setup in words????
Memorise a diagram and just state which quantities you will measure and what you will use for each. Then quote the equation and how you will use it. 🙂
how many vs in bover? how many fs in fink?
What are the variables in this experiment?
and thanks so much for the video!
Hiya, vary height, measure time. Use the gradient of a graph to calculate g. 😀
@@KitBetts-Masters
Can we classify h as the independent variable, and time as dependent?
+No controlled variables here, right?
Thanks :)
@@noorm6973 yes. You can say that. But the aim is to get g to highest accuracy. Control variables: on Earth! Also lowest friction/air resistance possible. Could do this in vacuum, but that's not practical in school so we use very short distances so air resistance is negligible compared to weight.
@@KitBetts-Masters sorry for the late reply, didn't receive a notification..
thanks so much for the answer!!
but I have a little question, didn't really get what you mean in that line: "Control variables: on Earth! Also lowest friction/air resistance possible"
could you elaborate more please?
and by that, do we consider air resistance as a control variable?
Thanks sooo much :)
well tickle my chinny chin chin and call me samantha fudge balls, your physics teaching 😍😍you’re too smooth with it g. How have I just discovered you❤️❤️❤️ gang gang
no understand. how it work
An easier one to understand: th-cam.com/video/iRHPiCoXhZc/w-d-xo.html
@@KitBetts-Masters i using photogate calculate gravity acceleration. the formula is g = 2h / t2 - t1. i watch here and found the formula are not same
@@tanwodan3689 different ways to achieve the same result. Sounds like you need this one: th-cam.com/video/oRIEX2yw1ME/w-d-xo.html