Simple Harmonic Motion (2 Viewers)

[posh bitch]

Hi guys, i just wanted to see what everyone is doing about the simple harmoic equations.

Are you guys just going to use the formulas or do you derive them each time like i do ?

What is required in the hsc ??

please help, thanksss in advance.

 

[Shadowless]

just look at past papers?

but i think derive

 

[Zenox]

You are required to know how to derive the six equations of motion.

 

[HeroicPandas]

Hi guys, i just wanted to see what everyone is doing about the simple harmoic equations.

Are you guys just going to use the formulas or do you derive them each time like i do ?

What is required in the hsc ??

please help, thanksss in advance.

Read the question carefully and remember

 

[HeroicPandas]

You are required to know how to derive the six equations of motion.

thats projectile motion?

 

[Zenox]

^ yeah oops

 

[Sy123]

Hi guys, i just wanted to see what everyone is doing about the simple harmoic equations.

Are you guys just going to use the formulas or do you derive them each time like i do ?

What is required in the hsc ??

please help, thanksss in advance.

Dont memorise any formulae except for





Just derive what you need to, also make sure you remember the basic rules of SHM
Like at end points of motion acc is maximum, velocity is zero
At centre acceleration is zero and velocity is maximum.
And symmetrical motion aswell etc etc

(You can derive the above properties but its just much more simple to state them and get on it with it)

http://phet.colorado.edu/sims/pendulum-lab/pendulum-lab_en.html

Use the simulation, although a pendulum just imagine the path of the thing stretched out on a straight line, this is what SHM is. Click Show acceleration and velocity to see the vectors which give you a really good idea about it

 

[Shadowless]

don't we also memorise: v^2 = n^2 ( a^2 - x^2 ) ?

 

[TheOptimist]

don't we also memorise: v^2 = n^2 ( a^2 - x^2 ) ?

My teacher said that we should not quote this formula because it is not a standard result, and that it must be derived from a=-n^2x

 

[HeroicPandas]

My teacher said that we should not quote this formula because it is not a standard result, and that it must be derived from a=-n^2x

I agree. But you can still use whatever method in the HSC like anything u want, u can use that v^2 = n^2...formula

 

[HeroicPandas]

But the thing is, some schools dont let u use v^2=n^2..., so u have to derive it

 

[Shadowless]

i agree. But you can still use whatever method in the hsc like anything u want, u can use that v^2 = n^2...formula

can anyone verify this?

 

[epsilon-]

can anyone verify this?

I verify this. You can use any method, any formula in the HSC.