Build a Prototype: Phase 1

BUILD A PROTOTYPE – PHASE 1: EFFECT OF INCLINED PLANE STEEPNESS ON SPEED• Instructions• Obtain switch, plane, steel ball, and half meter

sticks

• Set up switch as instructed by instructor

• Make a table in workbook as instructed• Heights: 2cm, 4cm, 6cm, 8cm, and 10 cm height

• Ramp: 20cm

• Time of descent

BUILD A PROTOTYPE – PHASE 1: EFFECT OF INCLINED PLANE STEEPNESS ON SPEED• Instructions• Make a table in workbook as instructed• Calculate the speed

• Graph results

BUILD A PROTOTYPE – PHASE 1• Instructions• Distance v. Time Graph

d

t

0.000.200.400.600.801.001.201.401.601.802.00

0.00 1.00 2.00 3.00 4.00 5.00 6.00

dist

ance

Time

d/t

PRACTICE• Complete the following Worksheets• “Analyzing Graphs of Motion without Numbers”

• “Acceleration and Speed-Time Graphs”

VOCABULARY REVIEW

• Acceleration – the change in velocity per unit time; a = Δv/Δt; unit: m/s/s

VOCABULARY REVIEW

• Speed – the distance traveled divided by the time elapsed; speed is a scalar quantity, it has no direction v = Δd/Δt; unit: m/s

• Velocity – the speed in a given direction; displacement divided by the time interval; v = Δd/Δt; unit: m/s

VECTOR VS. SCALAR

• Vector – a quantity that has both magnitude (size/amount) and direction

• Scalar – a quantity that has magnitude (size/amount) but no direction

REVIEWSection Distance Time Speed Acceleration

1 0.21 0.882 0.21 0.633 0.21 0.894 0.21 0.745 0.21 0.666 0.21 0.367 0.21 0.238 0.21 0.20

• Distance-Time Graphs

Graph 1

Graph 2

Graph 3

Graph 4

DESCRIBING MOTION

• Displacement – the difference in position between a final position and an initial position; it depends only on the endpoints, not the path; displacement is a vector quantity, it has magnitude (size) and direction

WHAT IS DISPLACEMENT

• Distance-Time Graphs

Graph 5

Graph 6

Graph 7

Graph 8

DESCRIBING MOTION

VELOCITY/TIME AND ACCELERATION/TIME GRAPHS

• Active Physics Books p. 64

• Analyze Graphs

QUIZ!!!