Agenda 9/23/13 Hand in Great Graphing homeworkQuiz: Graphing MotionRearranging equations practiceDiscuss homework p. 44, p. 49Notes/ Discussion: Kinematic EquationsPractice ProblemsHomework:

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 EquationsAcceleration is defined as the time

rate of change of velocity. It is a vector quantity.

Kinematic Equations∆ means “ change in”

∆d = df –di

∆t = tf –ti

∆v = vf -vi

Kinematic EquationsFor constant acceleration, a avg becomes a.

d

vva if

2

22

Kinematic EquationsFor 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:

2

fiavg

vvv

Kinematic Equations An equation for displacement can be derived

from the previous equations:

2

2

1tatvd i

Kinematic EquationsLet’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 Equations1) Starting from rest, a ball rolls down an incline at a constant acceleration of 2.00 m/s2.

(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 Equations2) A car traveling at 88 km/ hr undergoes a constant deceleration of 8.0 m/s2.

(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 Equations3) 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/s2)

Calculate the total distance traveled.

ReflectOn 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.