IB Physics SL revision - Mechanics 2 - accurate precise and error

[@fazebooce7127]

there is a special place in heaven for you sir, ive downloaded the full playlist and im revising physics for the next few months hopefully getting a seven.

[@falkinox4771]

my exams are very soon, thank you

[@젬레-q5y]

Thanks so much!!!!

[@melc7516]

"at least I'm measuring them equally wrong" 😂😂

[@mohammedmiller1972]

4:00 got em 👌🏼

[@shrinedump9465]

Goddamnit man

[@Minhnguyen-ny7gq]

thank you!

[@shanemania18]

Hello! First of all thank you so much for making these videos! They are really helping me with SL Physics. I've got a question, the other day I was solving May 2013 SL Physics Time zone 2 paper 2 and in the first question there was a graph with error bars [V(potential difference) vs Time] which goes down with a curve when connected (decreasing). And it wanted the "best fit line for the data starting from t=0" of that graph so I drew a straight line starting from (0,0) but the answer was actually connecting the error bars and having that curve for an answer. I'm so confused about what to do when the best-fit line is asked, please help!!!

[@mithir7]

earthtonaz Hey, I also struggled with that one but I figured out that you have to draw a tangent at that point. So you basically draw a straight line at say 3 different points and then you find the gradient at each point. Then comes the tricky part. You might remember the formula N= Noe^-&t (& is the wavelength). This is from chapter 7. Well using this, you will plug in for potenital difference and time, and then you will have to rearrange to solve for the constant. This is why you needed three different points. So then you compare the different values, see whether there is a trend and then you would state whether the relation is exponential or not.