Section 1.3

Acceleration measures how fast velocity changes. Mrs. Leos

• Acceleration: the rate with which velocity changes over time. • If velocity does not change, there is no acceleration

Changing Acceleration Speeding up Slowing down Changing directions at a constant speed Changing directions while slowing down or speeding up

Vectors To explain VELOCITY Show size and direction

Vectors To explain ACCELERATION Show size and direction

Vector To show acceleration Called negative acceleration rs

Vectors to show acceleration Change in direction

Investigation: Acceleration MOVEMENT OF STRING

While speeding up While slowing down While walking steadily

ANSWER: WHAT DO YOU THINK QUESTIONS

Acceleration can be calculated from velocity and time • The change in velocity can be found by comparing the initial velocity and the final velocity of the moving object.

Formula for acceleration

a



Final

.

Velocity



Initial

.

Velocity time

Units for acceleration

Units for a = m/s

2

Calculating Acceleration  WRITE OUT Sample Problem

MATH PRACTICE PROBLEMS

Velocity-Time Graphs Velocity- time graphs are used to understand acceleration Draw Velocity-Time graph on page 30 (textbook)

  On the left side of notebook demonstrate your understanding of Section 1.3

 Thinking map, rap, comic strip, foldable Write your summary