Classical physics

Homework and Study Help
1

hi friends
I am having trouble remembering the formulas of physics electrostatics, I am not even able to imagine, does anyone have any container so that I can easily recall them?
Please :pleading_face: reply

2 Likes
2

What are rhe formulas youre trying to remember

3 Likes
3

Is it practical to encode an entire formula in physics or any subject in particular or just a part of it just to aid recall?

2 Likes
4

IMO it is best to first understand the formula which comes from doing problems in which it is applied. Then create mnemonics to capture whatever remains slippery.

1 Like
5

Thank you but do you encode every single letter of the formula instead of a part of it? To trigger recall?

1 Like
7

Can’t upload photo

8

Thank you :smiling_face:

1 Like
9

Thanks for advice :smiley:

1 Like
10

Ideally not. That is my point. If you understand the formula then there is a web of logical relationships that ties the parts together and it should only be necessary to actively memorize a few details. Mostly mnemonics are just to jog your memory into recalling what you already know.

If you don’t understand the formula it probably won’t be useful to you when the time comes to apply it.

3 Likes
11

Yeah :sweat_smile: you are right :blush:

2 Likes
12

My recognising power is slow

2 Likes
13

I would like to advise you to not to remember too much formulae. Understand the concept first. Most of the formulas are interlinked

like
In case of forces

F = GMm/r² and F = KQq/r²

In case of fields,

E = GM/r² and E = KQ/r²

Use analogy while memorising formulas.

Use dimensional analysis of physical quantities like charge, current, potential difference, electric field.

Φ = EA ( electric flux )

You can use mnemonics like

Flea = Fl for Flux and ea for EA ( Φ = EA)

Φ = EAcosθ ( Mnemonics : Flea cash )

But I would like to advise you to not to remember formulas if you understand the concept. When you understand how the formulas are made then you will automatically remember the formulas.

3 Likes
14

This is great advice zvuv. If you (Senkuu) are having trouble understanding the meaning of the formulas, work with your teacher/professor. They should be able to help you develop an intuition for it. Good luck.

4 Likes
15

zvuv shared a great tips so try them

2 Likes
16

I have am a professor of physics. Just put the formulas on flashcards and used spaced repetition. Also you show know at least one example on how to use each one.

5 Likes
17

Thanks

1 Like
18

Good advice. I’d add one thing to this, which is to pay attention to units (dimensional analysis). The units on the left side of an equation must equal the units on the right side. Also, you can only add or subtract terms that have the same dimensions (e.g., you can’t subtract 60 miles from 100 miles/hour). Paying attention to dimensions can help you to construct equations that you don’t fully remember.

2 Likes
19

I use a major system-like approach. So for example, say you wanted to remember the energy form of Bernoulli’s equation:

P/p +V^2/2 +gz = constant… I would remember it as Pop Vein on Gas

to remember the equation of discharge:
Q = AV … Discharging Queenies Advanced Vainly!
Agular spread of diffraction:
θ = 1.22 λ/D …Athenian L a Dy
Irradiance from a point soure:
image
Power ReBor****n (r=4, pi=B, r=r , n=2)

Of course you have to be familiar with the basic major system.
But usually it’s best to memorize them intuitively. It makes sense that the further away objects are, the lower their gravitational attraction. The heavier they are, the stronger the gravitational pull etc.

4 Likes
20

Thanks
I like your concept :slightly_smiling_face:

1 Like