warm up what are the units of: –speed? –velocity? –acceleration? –distance? –time?

Warm Up

• What are the units of:– Speed?– Velocity?– Acceleration?– Distance?– Time?

Velocity or Speed from Acceleration

v f v0 a t

s f s0 a t

Find the Following

• Find vf when aavg = 2.0 m/s2; t = 2.0 s

• Find vf when v0 = 5.0 m/s; aavg = 0.50 m/s2; t = 6.0 s

Find the Following

• Find t when vf = 50.0 m/s; aavg = 2.50 m/s2; v0 = 0

Guaranteeing Partial Credit

1. Organize what the problem gives you

2. Make a drawing if necessary

3. Identify the equation you will use

4. Fill in the equation with the givens

5. Show your work

6. Circle your answer with the proper units

Word Problem

• While driving his sports car at 20.0 m/s down a four-lane highway, Eddie comes up behind a slow-moving dump truck and decides to pass it on the left-hand lane. If Eddie can accelerate at 5.00 m/s2, how long will it take for him to reach a speed of 30.0 m/s?

Word Problem

• Vivian is walking to the hairdresser’s at 1.3 m/s when she glances at her watch and realizes that she is going to be late for her appointment. Vivian gradually quickens her pace at a rate of 0.090 m/s2.– What is Vivian’s speed after 10.0 s?– At this speed, is Vivian walking, jogging, or

running very fast?

Warm Up

• A motorcyclist is traveling at 10 m/s along a flat and straight road. How long will it take to reach 32 m/s if the motorcycle can constantly accelerate at 4 m/s2?

Test Material

• Vectors (pgs. 28-32), especially section 3.3, Chapter 3 review questions 6, 24-27 (for 27, just the first 2 questions)

• Linear motion (pgs. 10-16), Chapter 2 review questions 1-14, 26-30, 42-46

• Graphs of Motion (pgs. 21-24)

Distance vs Time Graphs

• Work in groups for 4

• Go to www.explorelearning.com

• Launch the “Distance-Time Graph” Gizmo

• Complete and hand in Exploration worksheet by the end of the period– 1 per group, make sure to put ALL of your

names

Warm Up

• Sit in your normal seats for attendance

• In the Gizmo, what was happening when the graph looked like:

• A B C

• Finish Gizmo