ACCELERATION

WHAT DO WE DO WHEN MOTION LOOKS LIKE THIS?

Velocity is NOT constant!

What does this mean is happening?

ACCELERATION

…a change in velocity

NEW VARIABLES

avf

vi

v

KINEMATIC EQUATIONS

∆x = vi∆t + ½a(∆t)2

a =

PRACTICE #1

A car slows from 22m/s to 3.0 m/s at a constant rate of 2.1 m/s2. How many seconds are required before the car is traveling at 3.0 m/s?

PRACTICE #2

A student is leaving the CHS parking lot after school. He starts his car and accelerates uniformly for 5.32 seconds over a distance of 195 m (it is Friday afternoon). What is the acceleration of the sports car?

KINEMATICS PROBLEMS

STACKS OF CURVES WORKSHEET

START FREE FALL HERE

WYLIE E. COYOTE

P/T

Ball Toss Lab Graphs

V/T

GRAPHS FOR DROPPED OBJECT

FREE FALL

Definition?Only force acting is gravityUp and down

Forces cause acceleration

ACCELERATION DUE TO GRAVITY

Same for all objectsDoes not depend on mass, heightIgnore air resistance- 9.8 m/s2

Why negative?

FREE FALL PROBLEMS

Up is positive, so down is negative

Same tools (replace “a” with “g” in equations)