Why is physics so hard (1 Viewer)

[kkk579]

Please help, why is it so difficult compared to chemistry? Is it normal to be struggling this early one? Weird how some ppl find physics easier than chemistry, i just dont get how they think that

 

[Aeonium]

Please help, why is it so difficult compared to chemistry? Is it normal to be struggling this early one? Weird how some ppl find physics easier than chemistry, i just dont get how they think that

which module is this? (or is it just mod 1-2?)

 

[kkk579]

which module is this? (or is it just mod 1-2?)

Yeah i havent even started mod2 yet and im already struggling with the harder questions on mod1

 

[Aeonium]

Yeah i havent even started mod2 yet and im already struggling with the harder questions on mod1

suvat, graphs or relative motion?

 

[kkk579]

suvat, graphs or relative motion?

relative motion and suvat but relative motion mainly - for some qs i just sometimes have no clue where to start and the qs really confuse me

 

[Aeonium]

relative motion and suvat but relative motion mainly - for some qs i just sometimes have no clue where to start and the qs really confuse me

do you have any examples? personally i couldn't find any 'extension' relative motion qns besides "velo of a relative to b is ... –> velo of b relative to ground is ... hence find velo of a"

 

[kkk579]

do you have any examples? personally i couldn't find any 'extension' relative motion qns besides "velo of a relative to b is ... –> velo of b relative to ground is ... hence find velo of a"

 

[kkk579]

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These would probably be of a normal
/medium difficulty but since im bad at physics theyre hard

 

[Aeonium]

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first step(s): draw a diagram & convert all units to SI units (also is this peak LOL)
do u want me to do it and show working

 

[kkk579]

first step(s): draw a diagram & convert all units to SI units (also is this peak LOL)
do u want me to do it and show working

If you could that would be good

 

[s97127]

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is this y11 or 12?

 

[kkk579]

is this y11 or 12?

11

 

[kkk579]

first step(s): draw a diagram & convert all units to SI units (also is this peak LOL)
do u want me to do it and show working

Nah lol its not peak

 

[s97127]

11

i will give them a try but I know nothing abt physics

 

[Aeonium]

These would probably be of a normal
/medium difficulty but since im bad at physics theyre hard

suvat qns can't really get that hard

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qn 1 (btw this is quite lengthy)

so first step as before:
draw diagram/convert to si units (ngl i just half drew a diagram so i don't think it'd help to see mine). if your tutor hasn't told you already, you can go from km/h –> m/s by dividing 3.6 and vice versa
the displacement between point a and b (ignoring the cars both moving for now) is 10 (distance between front of car and back of truck) + 20 (length of truck) + 10 (distance between final car rear & front of truck) + 4 (length of car) = 44m (i am using the front of the car as a reference point)
now you use the formula . you assume that the truck and the car have the same initial velocity (so might asw consider them as relative velo of 0)
so

so then you can plug that time value back into ; u = 20m/s, a = 3.5, t = that value and that's the answer (pretty sure)

 

[kkk579]

suvat qns can't really get that hard

qn 1 (btw this is quite lengthy)

so first step as before:
draw diagram/convert to si units (ngl i just half drew a diagram so i don't think it'd help to see mine). if your tutor hasn't told you already, you can go from km/h –> m/s by dividing 3.6 and vice versa
the displacement between point a and b (ignoring the cars both moving for now) is 10 (distance between front of car and back of truck) + 20 (length of truck) + 10 (distance between final car rear & front of truck) + 4 (length of car) = 44m (i am using the front of the car as a reference point)
now you use the formula . you assume that the truck and the car have the same initial velocity (so might asw consider them as relative velo of 0)
so

so then you can plug that time value back into ; u = 20m/s, a = 3.5, t = that value and that's the answer (pretty sure)

Answer for that q is t=5s and distance is 144m

 

[Aeonium]

Answer for that q is t=5s and distance is 144m

yep then mine is correct they just rounded it

 

[kkk579]

yep then mine is correct they just rounded it

How to get good at physics

 

[Aeonium]

How to get good at physics

um tbh idk it's just weird ig just spam qns and know which assumptions to make/which assumptions are used that's the part a lot of people struggle with and if your tutor goes through it then you're fine

 

[Aeonium]

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b) what are these terrible units this is def from different syllabus (perhaps university since it looks latex'd)

A. do 45 * 1.852/3.6 * 2 (fuck these units again)
b. tricky tricky B is still moving away when that hapens (i'll also assume the sound wave does not 'inherit' the boat's velocity

c. plug 45 * 1.852/3.6 * time
i think this works but also i was vv distracted when writing this out