Help needed with Skills! (1 Viewer)

[sipahi]

Hi everyone, I require guidance with the skills sections of the physics course..If people have any material, notes practice papers for me to improve my skills, it would help very much.
Thankyou in Advance

 

[iBibah]

Hi everyone, I require guidance with the skills sections of the physics course..If people have any material, notes practice papers for me to improve my skills, it would help very much.
Thankyou in Advance

What are the things in particular you need help with?

 

[sipahi]

mainly to do with graphing...i struggle with graphing and line of best fit..lol..I have no idea why

 

[iBibah]

mainly to do with graphing...i struggle with graphing and line of best fit..lol..I have no idea why

You mean you don't know how to graph and find the line of best fit?

 

[sipahi]

well.....err...Wheres my teacher when i need him to comment on this type of question T_T..
So basically i'm confused about how to draw line of best fit..because I have heard conflicting things..I just want to learn the correct thing..I konw how to graph..but I get confused when the question asks you to draw a graph which prodces a straight line from a given set of information T_T.. and little tricks like that..so I want peoples experiences to help me with skills and types of questions that could be asked.
Thanks for the replies btw repped

 

[iBibah]

well.....err...Wheres my teacher when i need him to comment on this type of question T_T..
So basically i'm confused about how to draw line of best fit..because I have heard conflicting things..I just want to learn the correct thing..I konw how to graph..but I get confused when the question asks you to draw a graph which prodces a straight line from a given set of information T_T.. and little tricks like that..so I want peoples experiences to help me with skills and types of questions that could be asked.
Thanks for the replies btw repped

Some information you get from an experiment is not 100% accurate (for obvious reasons) but theoretically should produce consistent results. Because data can vary from what it's 'supposed' to be, we draw a line of best fit to essentially 'summarise' our data, and produce patterns that are more 'theoretically correct'. When you are asked to draw a graph which produces a straight line, you just plot all the data and then draw the line of best fit.

A tip for drawing a line of best fit:
- Draw a line that is as close to all the points as possible - least deviation form the points. But when you draw it, try to make it pass through at least two of the points exactly, as it will make it easy to determine the gradient (as most questions make you do) a little more accurately.

 

[sipahi]

Thankyou for your help.. ..With the drawing of straight line from a given set of information, was not as simple as just using the values listen because some of the information was in the form of squares eg. v^2 or r^2, hence they would naturally produce a curve as others were kept constant....Sorry my english is bad if you couldnt understand my context

 

[Fizzy_Cyst]

well.....err...Wheres my teacher when i need him to comment on this type of question T_T..
So basically i'm confused about how to draw line of best fit..because I have heard conflicting things..I just want to learn the correct thing..I konw how to graph..but I get confused when the question asks you to draw a graph which prodces a straight line from a given set of information T_T.. and little tricks like that..so I want peoples experiences to help me with skills and types of questions that could be asked.
Thanks for the replies btw repped

Your teacher was tutoring

But, yeah.. listen to Habibi, he knows what he is on about

Just think about the equation that the result(s) are relating to. For example, if you are doing gravitational force, you know that F = Gm1m2/d^2, therefore if you think about the equation of a straight line (y = mx+b), you can change the equation to F = Gm1m2 x 1/d^2, therefore if you plot F vs 1/d^2 you will get a straight line as they are proportional and Gm1m2 are constant, therefore the gradient of your straight line will be Gm1m2

 

[iBibah]

Thankyou for your help.. ..With the drawing of straight line from a given set of information, was not as simple as just using the values listen because some of the information was in the form of squares eg. v^2 or r^2, hence they would naturally produce a curve as others were kept constant....Sorry my english is bad if you couldnt understand my context

The line of best fit can be curved. It's rare, but it can still occur. Same concept as a straight line, draw a line as close as you can to all the points, which should be curved naturally.

 

[sipahi]

Thankyouu...iBibah (?) and Sir..but can i still get resources to help practice this type of stuff please ^_^

 

[Fizzy_Cyst]

You have all those trials which I put up for the class, surely there are some skills-based questions in them

 

[sipahi]

ok...will tryy!!