Presentation on theme: "Accelaration, Speed, and Velocity"— Presentation transcript:
1 Accelaration, Speed, and Velocity TOY CAR ACTIVITY
2 Background Knowledge VOCABULARY Speed-a measurement of distance over time, calculated by dividing the distance an object travels by the time it takes to travelAcceleration-the rate in which motion changes
3 More VocabularyVelocity-a measurement of both the rate of motion(speed) plus the directionEx. 1 inch per second=speedEast at 1 inch per second=velocitySPEED, VELOCITY, AND ACCELERATION CAN BE SHOWN BY USING GRAPHS!!!
4 OBSERVEWatch the two cars as they move and record your observations in your science learning journal. Use the first three questions to guide your observations.How does the motion of the two cars differ?Is the speed of the cars changing or staying the same?How can we determine if the speed is staying constant?What equipment would we need for this investigation?How would we record our data?
6 Procedure Draw this table underneath your materials list. TIME TRIAL 1 5 SECONDS5410 SECONDS10015 SECONDS142.520 SECONDS25 SECONDS30 SECONDS35 SECONDS40 SECONDS
7 ASSIGNING JOBS TIME KEEPER POST-IT MARKER CAR MANAGER RULER OF THE RULEREVERYONE’S JOB IS EQUALLY IMPORTANT!!!!
8 PROCEDURES CONT.The Car Manager turn on the toy car and set it as straight as possible behind the starting line but not letting go.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.The Time Keeper will be ready with the stop watch and tell the Car Manager when to let go.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.The Car Manager will stop the car after 40 seconds.The Ruler of the Ruler will measure the distance in between each post-it and record it in the table.Do this 2 more times for a total of 3 trials.
9 Collecting DataThe Ruler of the Ruler will share his/her measurements so the other group members can record them in their table.The group will find the mean for each time interval using data from all three trials.GRAPH IT!!!
10 PRESENT FINDINGSOne person from each group will present their graph to the class.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?
11 THINK ABOUT IT…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!
12 Assessment Turn in your line graph you created with your group. ANSWER THE QUESTIONS ON THE SHEET OF PAPER GIVEN. USE COMPLETE SENTENCES!!!!!