Translational Motion Projectile Motion Circular Motion Motion Map

Motion Map • Which direction is the object moving?

Tactics: Vector Addition Working in groups of 3, do two examples of vector addition

Tactics: Vector Subtraction Working in groups of 3, do two examples of vector subraction

The Displacement vector Using vector subtraction and working on the whiteboards, show you get

Average Speed, Average Velocity To quantify an object’s fastness or slowness, we define a

Motion Map • Displacement vectors • Velocity Vectors Dr 4 v 4 Dt Dr

Motion Map • Δt is the same between each position, so we can drop

Linear Acceleration Because velocity is a vector, it can change in two possible ways.

Tactics: Finding the acceleration vector

Tactics: Finding the acceleration vector Complete a motion diagram and find the acceleration for

A particle undergoes acceleration while moving from point 1 to point 2. Which of

EXAMPLE 1. 7 Interpreting a position graph

Tactics: Drawing a pictorial representation

Draw a Pictorial Representation • Jane slams on her brakes while driving 30 mph

• Analyze the graph. Describe the motion by creating a pictorial representation. Position

Upcoming Assignments • Mastering. Physics online HW due tonight by 11 pm • Pre-class

Slides: 22

Download presentation

Translational Motion Projectile Motion Circular Motion

Motion Map • Which direction is the object moving?

Tactics: Vector Addition Working in groups of 3, do two examples of vector addition -on your whiteboard, draw two random vectors, then add them graphically

Tactics: Vector Subtraction Working in groups of 3, do two examples of vector subraction -on your whiteboard, draw two random vectors, then add them graphically

The Displacement vector Using vector subtraction and working on the whiteboards, show you get this vector, Δr 1 r 0 Dr 2 r 1

Average Speed, Average Velocity To quantify an object’s fastness or slowness, we define a ratio as follows: Average speed does not include information about direction of motion. Average velocity does include direction. The average velocity of an object during a time interval Δt, in which the object undergoes a displacement Δr, is the vector

Motion Map • Displacement vectors • Velocity Vectors Dr 4 v 4 Dt Dr 3 v 3 Dt Dr 2 Dr 1 Dr 0 v 2 Dt v 1 Dt v 0 Dt

Motion Map • Δt is the same between each position, so we can drop it • Velocity, v, is proportional to displacement, Δr v 4 v 3 v 2 v 1 v 0

Motion Diagrams with Velocity Vectors

Linear Acceleration Because velocity is a vector, it can change in two possible ways. 1. The magnitude can change, indicating a change in speed, or 2. The direction can change, indicating that the object has changed direction. We will concentrate for now on the first case, a change in speed.

Tactics: Finding the acceleration vector

Tactics: Finding the acceleration vector Complete a motion diagram and find the acceleration for an object moving: Down an incline while speeding up Up an incline while slowing down

A particle undergoes acceleration while moving from point 1 to point 2. Which of the choices shows the velocity vector as the object moves away from point 2?

EXAMPLE 1. 7 Interpreting a position graph

Tactics: Drawing a pictorial representation

General Problem-Solving Strategy

Draw a Pictorial Representation • Jane slams on her brakes while driving 30 mph and skids to a halt in 60 feet. How long does it take her to come to a stop?

• Analyze the graph. Describe the motion by creating a pictorial representation. Position (m) Graphical Representation 6 4 2 2 6 8 Time (s)

Upcoming Assignments • Mastering. Physics online HW due tonight by 11 pm • Pre-class Mastering. Physics assignment due before class on Tuesday • Pre-class Mastering. Physics assignment due before class on Thursday • Mastering. Physics online HW due Thursday by 11 pm