SPM Physics: The 'Untold' Facts

Recently, a form 4 student who scored straight As in PMR asked me for my opinion.
He asked me; "Sir,..i want to do ‘medic’ after SPM, but i want to drop physics coz some said it is irrelevant. Should i drop it or not ??

Listening to the question made me remained in silent mode. I took almost half a minute to think of the best way to answer it. I neither say 'no' or 'yes' to his question. At the same time, i'm not going to leave him in clueless. After a carefull thought, i gave him a very  useful facts which i think has broaden his perspective on how important physics gonna be in his future. For me, if u undecided about something, u need to gather as many facts as u can. However, please make sure those info are genuine facts & not a hearsay that u collected from unreliable sources.

Ok.. back to this student, what did i tell him that made him changed his mind? Its simple, i said when u studied something u must learn the art to relate it in our real life. I provoked him with these questions, .. "U intended to do medic,..are u good in biology??"  He replied "yes..i love science & human anatomy". Then..I asked him about basic human blood system, it seems that he could answer it very well. Finally, i trapped him with this question..,
"Have u ever heard about this medical term..."blood pressure"?? ..he answered 'yes'.
Next, i asked him "do u understand what causes that "pressure"??? Then he looked at me with a puzzled look.. His face suggested,he admitted that he knew nothing about pressure & yet if he'll become a doctor, he'll be learning in detail about 'blood pressure'. So if  he didnt take physics, it is going to give some disadvantage for him in the future.
In the end i dont need to answer Yes or NO.. all i did is to let him think of what kind of  facts that he needs in order to decide his future.

Almost the same skills are needed in answering physics questions.All u need to do is to gather as many facts  as u can in a given question. Nevertheless, u shouldnt forget the most crucial part, ie the 'untold' facts. Identifying the untold or hidden facts is vital to solve any problems whether it is a calculation or subjective questions.In exams, some words or phrases has hidden meaning...for examples:

stationary object or at rest = it tells,the object has zero initial velocity or all the forces acting are in equilibrium

uniform/constant velocity = it has zero acceleration, thus the net forces acting is zero,ie equilibrium

boiled water = it tells that it has 100 degree celcius

'cooled under ice point' = it tells that the temp is 0 degree celcius

denser object = the object is heavier

There are many other words or phrases with double meaning in physics questions..so please watch them out!!

Ok now lets get back to the 'blood pressure' stuff. Ok seems most of my visitors are this year SPM candidates, so i want u to give some thought on the following statement:

For those who has 'penyakit darah tinggi', doctors advised them not to eat too much salty food.Can u explain by using relevant physics concept, why they discouraged them not to take too much salts?


U can discuss it in a comment section or the chatbox. Give it a try!! Lets see who has the talent to become a 'future doctor' that took physics :)