How Are Speed and Velocity Related? Physics Topics How Are Speed and Velocity Related? Phabulous Physics: Introduction

Speed and Velocity Phabulous Physics: Introduction total distance total displacement Average speed = Average velocity = time time Is it possible to move with constant speed but not constant velocity? Delete answers in red before presentation and fill in with student responses Yes. (Cruising at 55 mph around a corner  changing direction = changing velocity) Time = 1 min 18 sec Start Finish = 500 m 500 m Is it possible to move with constant velocity but not constant speed? average speed = = 6 . 4 m 78 s s m No. (A change in speed would cause a change in velocity.) average velocity = = m 78 s s 8

Acceleration Positive acceleration means increasing velocity Phabulous Physics: Introduction Positive acceleration means increasing velocity Negative acceleration means decreasing velocity

Five Important Equations Phabulous Physics: Introduction Variable That’s Missing #1 #2 #3 #4 #5

Derivation of Equations 3 & 4 Phabulous Physics: Introduction

Derivation of Equation 5 Phabulous Physics: Introduction

Graphs Displacement Time Velocity Acceleration Phabulous Physics: Introduction Displacement Time Velocity Acceleration Ask what each graph could represent and pose the Unit Question, Can the motion of any object be predicted? 123546987

Graphs Displacement Time Velocity Acceleration Phabulous Physics: Introduction Displacement Time Velocity Acceleration Ask what each graph could represent and pose the Unit Question, Can the motion of any object be predicted? 231456897

Graphs Displacement Time Velocity Acceleration Phabulous Physics: Introduction Displacement Time Velocity Acceleration Ask what each graph could represent and pose the Unit Question, Can the motion of any object be predicted? 123654897

Graphs Displacement Time Velocity Acceleration Phabulous Physics: Introduction Displacement Time Velocity Acceleration Ask what each graph could represent and pose the Unit Question, Can the motion of any object be predicted? 123654789

Start Projectile Motion Demo Phabulous Physics: Introduction Start Projectile Motion Demo