Agenda 9/23/13 Hand in Great Graphing homework Quiz: Graphing Motion Rearranging equations practice Discuss homework p. 44, p. 49 Notes/ Discussion: Kinematic Equations Practice Problems Homework: Objective(s): Students will analyze motion in one dimension using equations.

Kinematic Equations Average velocity is defined as the total displacement divided by the total elapsed time. It is a vector quantity.

Kinematic Equations Acceleration is defined as the time rate of change of velocity. It is a vector quantity.

Kinematic Equations ∆ means “ change in” ∆d = d f –d i ∆t = t f –t i ∆v = v f -v i

Kinematic Equations For constant acceleration, a avg becomes a.

Kinematic Equations For constant acceleration, the average velocity for any given interval of time can be found by taking one-half the sum of the initial and final velocities:

Kinematic Equations An equation for displacement can be derived from the previous equations:

Kinematic Equations Let’s practice using these equations. Get white boards and markers for your table group. You may choose to write these problems in your notebook ALSO.

Kinematic Equations 1) Starting from rest, a ball rolls down an incline at a constant acceleration of 2.00 m/s 2. (a) What is the velocity of the ball after 8.5 sec? (17 m/s) (b) How far does the ball roll in 10.0 sec? (100 m)

Kinematic Equations 2) A car traveling at 88 km/ hr undergoes a constant deceleration of 8.0 m/s 2. (a) How long does it take the car to come to a stop? (3.1 sec) (b) How far does the car move after the brakes are applied? (37 m)

Kinematic Equations 3) An object starts from rest and moves with constant acceleration for a distance of 150 m in 25 sec. What is the acceleration of the object? (0.48 m/s 2 )

Calculate the total distance traveled.

Reflect On a scale of 1-10, how well did you comprehend the lesson? Remember, if you need help, then please attend tutorials before the test. We will now cover Free Fall Motion.