B. Interpreting Motion Diagrams

Acceleration Review

Acceleration - the time rate of change in velocity  

- constant  change
in velocity per unit time

Which data shows uniform acceleration? Why?

Left Data Shows Constant Acceleration

a = ?

a = 2 m/s²

Describe the motion

Ex)

Step 1 - y changes?

Step 2 - Slope = ∆y/∆x =

Answers

Step 1 - y changes: - Velocity is increasing

Step 2 - Slope = ∆V/∆t  = a

acceleration is constant +

Prove this is constant acceleration

Find the acceleration 

a = ∆V/∆t

(15 m/s)/2 sec 

a = 7.5 m/s²

Slope of a V vs. t plot

Slope = ∆y/∆x

= ∆V/∆t = a

Ex)

Describe motion using
y axis and slope

Step 1: y axis:

Step 2: Slope

Answers

Step 1: y axis: V constant

Step 2: Slope = ∆V/∆t  = a

a = 0

Ex) Largest acceleration?

January 2001 Regents

D - greatest slope