C)
#modelling follow on
lucid goblet
How do u do
a = deltaV / deltaT you can find speed and you know time
celest pagoda
How would u do it in tbis case
lucid goblet
How would u do it in tbis case
you know your constant A and B so you sub in t to find velocity at t = 5 then you know speed and you know thats the speed when t = 5 so you can do a = your value for V / 5
celest pagoda
you know your constant A and B so you sub in t to find velocity at t = 5 then yo...
Why V / 5
And when u sub in all the values, isn't that just finding V . Like how do u differentiate it
lucid goblet
And when u sub in all the values, isn't that just finding V . Like how do u diff...
yeah v is velocity, acceleration = velocity / time, when you find velocity thats the velocity at t=5 so you do V / 5
if you look at marks they wouldnt make you differentiate for 2 marks
dapper sonnet
if you look at marks they wouldnt make you differentiate for 2 marks
i would argue they would seen as its very easy to differentiate and then sub in t=5
@celest pagoda you differentiate the -be^-0.17t seen as thats the only bit you can differentiate
lucid goblet
i mean you could differentiate it works maybe im just biased
dapper sonnet
and then sub in t=5
dapper sonnet
i mean you could differentiate it works maybe im just biased
too physics minded 😂
lucid goblet
too physics minded 😂
😭
just see e and dont wanna differentiate tbh
even if it is easy
dapper sonnet
cmon now its just 0.17be^-0.17t
lucid goblet
yeah im deffo biased
celest pagoda
<@885615693972779070> you differentiate the -be^-0.17t seen as thats the only bi...
Wb the A
Or like are we skipping A
How do u dodderenciate it
celest pagoda
Index × interger
Index - 1
dapper sonnet
thats for powers of x
Like if I asked you to differentiate 2 what would you say it is
celest pagoda
Nth
dapper sonnet
exactly
celest pagoda
So would thT mean that it becomes 0!?
celest pagoda
Wb the right side
dapper sonnet
if you expand the bracket you get B -Be^-0.17t
the second bit is the bit you need to differentiate and B differentiated is just 0 as it is just anumber like A was
celest pagoda
if you expand the bracket you get B -Be^-0.17t
Wait could u like write it like visually
A = 11
B = 7
dapper sonnet
Ok so V= 11 +7(1-e^-0.17t)
expand it V=11 +7 -7e^-0.17t
V=18- 7e^-0.17t
differentiating e^-0.17t is -0.17e^-0.17t then you multiply that by -B which is -7 so you get 1.19e^-0.17t
sub in t=5 you get 1.19e^-0.85
which is 0.509
celest pagoda
differentiating e^-0.17t is -0.17e^-0.17t then you multiply that by -B which is ...
I don't get this part
Did u like separate them
And differentiated the e part
And then × 7
Giw did it become -0.17e^-0.17t
Ohhh wait I think I get that part. But doesn't the power decrease by 1
dapper sonnet
oh have you never differentiated e^x before
dapper sonnet
well e^x differentiates to e^x and therefore if theres a number like -0.17 infront of the x you use chain rule and multiply by -0.17