Mathematics Help from MARGARET GROVE TEXTBOOK (2 Viewers)

[posh bitch]

I need help with one question int he margaret grove textbook.
It is in the hsc textbook on physical applications of calculus.

I dont get how to do question 32 in exercise 6.2

i have also uploaded a picture for those who dont have the textbook

any help would be appreciated

thankss

 

[Drongoski]

Is the answer: ?

 

[lnx]

can you explain how you did it please?

 

[posh bitch]

no the answer is 458 km per hour
well so the textbook states

im not sure on how to do the questionn

 

[Parvee]

no the answer is 458 km per hour
well so the textbook states

im not sure on how to do the questionn

thats the same thing as drongoski's answer

 

[Deliriously]

thats the same thing as drongoski's answer

LOL

 

[posh bitch]

oh yeah sorry, i read it wrongg
how did you do it ???

 

[gr_111]

OP look here... http://community.boredofstudies.org/showthread.php?t=286802&p=5975899#post5975899

 

[Drongoski]

OP look here... http://community.boredofstudies.org/showthread.php?t=286802&p=5975899#post5975899

gr_111's solution is good. Using his notation I did it this way:




Differentiating both sides wrt t:










Edit:

Some of you may find the differentiation hard to follow. In the LHS, it is simply using the Chain Rule:

 

[posh bitch]

omgg yay i get it now,
thank you so much guyss