Projectile Motion (1 Viewer)

[FinalFantasy]

Can we just use R=v²sin2@\g?
if ur not given it, or do u have to derive it first?

 

[Templar]

I think you need to derive it.

 

[nit]

Yeh you would have to derive it.

 

[KFunk]

Derive it, it doesn't take too long.

 

[nick1048]

Why would you need to derive it?

 

[Idyll]

Otherwise the entire projectile motion topic would degenerate into remembering 30 odd formulas, which doesn't promote the slightest amount of understanding of the topic.

 

[Abtari]

Just derive it!!

 

[Jago]

Why would you need to derive it?

because marks are awarded for derivation.

 

[who_loves_maths]

Originally Posted by Idyll
Otherwise the entire projectile motion topic would degenerate into remembering 30 odd formulas, which doesn't promote the slightest amount of understanding of the topic.

haha... yea, why make maths into another HSC Physics (or Chem.)?

 

[FinalFantasy]

okies thx, juz making sure

 

[thunderdax]

A lot of people make mistakes by remembering formulas and getting them wrong when the projectile starts from a point above the ground.

 

[chap87]

if u dont wanna derive it, is it really worth doing ext one. The deriving is worth big marks (an everage question seems to be about 4-5 marks). Besides, by deriving, there are other things that may need to be answered that you will come across.

 

[FinalFantasy]

im not not deriving it, i saw the equation in a text book and was just wondering..
i always do it from da basics

 

[haboozin]

well most the questiosn say show that the range is...

so u cant really just throw the equation in.

It was in 2004 HSC Q6 b i i think... 2 marks.