accelaration , speed, and velocity
DESCRIPTION
Accelaration , Speed, and Velocity. TOY CAR ACTIVITY. Background Knowledge. VOCABULARY Speed- a measurement of distance over time, calculated by dividing the distance an object travels by the time it takes to travel Acceleration -the rate in which motion changes. More Vocabulary. - PowerPoint PPT PresentationTRANSCRIPT
Accelaration, Speed, and
VelocityTOY CAR ACTIVITY
Background KnowledgeVOCABULARYO Speed-a measurement of distance
over time, calculated by dividing the distance an object travels by the time it takes to travel
O Acceleration-the rate in which motion changes
More VocabularyO Velocity-a measurement of both the
rate of motion(speed) plus the direction
Ex. 1 inch per second=speed East at 1 inch per second=velocity
O SPEED, VELOCITY, AND ACCELERATION CAN BE SHOWN BY USING GRAPHS!!!
OBSERVEO Watch the two cars as they move and record
your observations in your science learning journal. Use the first three questions to guide your observations.
O How does the motion of the two cars differ?O Is the speed of the cars changing or staying the
same?O How can we determine if the speed is staying
constant?O What equipment would we need for this investigation?O How would we record our data?
Let’s Investigate!!O Materials:-Yard sticks-Post-it notes-Toy car-Pencil-Science learning journal-Stopwatch
ProcedureDraw this table underneath your materials list. TIME TRIAL 1 TRIAL 2 TRIAL 35 SECONDS 5410 SECONDS
100
15 SECONDS
142.5
20 SECONDS25 SECONDS30 SECONDS35 SECONDS40 SECONDS
ASSIGNING JOBSO TIME KEEPERO POST-IT MARKERO CAR MANAGERO RULER OF THE RULER
EVERYONE’S JOB IS EQUALLY IMPORTANT!!!!
PROCEDURES CONT.1. The Car Manager turn on the toy car and set it as straight
as possible behind the starting line but not letting go.2. The Post-it Marker will stand in front of the car but off to
the side as it moves. He/she will need to be ready to mark at each 5 second interval.
3. The Time Keeper will be ready with the stop watch and tell the Car Manager when to let go.
4. The car will go for 40 seconds total while the Time Keeper tells the Post-it Marker to mark the spot of the car every 5 seconds.
5. The Car Manager will stop the car after 40 seconds. 6. The Ruler of the Ruler will measure the distance in
between each post-it and record it in the table.7. Do this 2 more times for a total of 3 trials.
Collecting DataO The Ruler of the Ruler will share
his/her measurements so the other group members can record them in their table.
O The group will find the mean for each time interval using data from all three trials.
O GRAPH IT!!!
PRESENT FINDINGSO One person from each group will present their
graph to the class.O Answer these questions:What do all of the graphs have in common?What do they think the straight line means if there is one?Are there any differences in the graph?What is the speed of your group’s car? Use your formula. distance÷time or distance/timeHow do the graphs with slow cars differ from the graphs with fast cars?What is causing the difference in distance?
THINK ABOUT IT…O If each car operates with the same
motor (force causing the car to move) why do some of them travel at slower speeds?
LET’S TAKE A LOOK!
AssessmentO Turn in your line graph you created
with your group.O ANSWER THE QUESTIONS ON THE
SHEET OF PAPER GIVEN. USE COMPLETE SENTENCES!!!!!