How to differentiate in physics?I mean read on........?

Question

for ex.For a body in non-uniform motion with x or y=(t+3) raised to the power 3 i.e y=(t+3)3 then how do we differentiate this function of a function.Like let t+3 be u.Therefore differentiate=dy/du*3(t+3)2(in power)*du/dt*1
=3(t+3)2(in power)+1 ans(probably)

It would be better if somebody can teach me online.

Answer 1

Actually it is calculus
y'=3(t+3)^2
y"=6(t+3)

let y=x^n
y'=n x^ (n-1)

let y= (x^m + a)n
y'=n(x^m+a)^(n-1) (m x^(m-1))

Let me know if you have any questions.