1. Physics 218: Mechanics Instructor: Dr. Tatiana Erukhimova Sections 807, 808, 809 Lecture 2

2. Derivatives Indefinite integrals Definite integrals Examples Overview of Today’s Class

3. Quiz 1. If f(x)=2x 3 what is the derivative of f(x) with respect to x? 6x 8x 2 I have no clue how to start 6x 2

4. 1. If f(x)=2x 3 evaluate 2x 4 I have no clue how to start 0.5x 4 +Const 2x 2 /3

5. 1. If f(x)=2x evaluate 2x 3 /3 I have no clue how to start 5 x 2 +Const

6. Derivatives A derivative of a function at a point is a slope of a tangent of this function at this point.

7. Derivatives

8. or Function x(t) is a machine: you plug in the value of argument t and it spits out the value of function x(t). Derivative d/dt is another machine: you plug in the function x(t) and it spits out another function V(t) = dx/dt

9. Derivative is the rate at which something is changing Velocity: rate at which position changes with time Acceleration: rate at which velocity changes with time Force: rate at which potential energy changes with position

10. Derivative is the rate at which something is changing -Size of pizza with respect to the price -Population of dolphins with respect to the sea temperature …………………

11. GDP per capita

12. Quiz 6x 2 +5 If what is the derivative of x(t) with respect to t? If f(x)=2x 3 +5x what is the derivative of f(x) with respect to x?

13. Indefinite integral (anti-derivative) A function F is an “anti-derivative” or an indefinite integral of the function f if

14. Indefinite integral (anti-derivative)

15. n – integer except n=-1

16. Definite integral F is indefinite integral

17. Definite integral

18. Integrals Indefinite integral: n – any number except -1 Definite integral:

19. Have a great day! Please return the folders Reading: Chapter 2