Lab: Motion (virtual lab)

Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint in meters by the change in time. Record your answers in Table C of your Student Guide. The speed at the first quarter checkpoint is ___ m/s. The speed at the second quarter checkpoint is ___ m/s. The speed at the third quarter checkpoint is ___ m/s. The speed at the finish line is ___ m/s.

- 0.74 - 1.40 - 1.60 - 1.88

Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint, in meters, by the change in time. Record your answers in Table E of your Student Guide. The speed at the first quarter checkpoint is ___ m/s. The speed at the second quarter checkpoint is ___ m/s. The speed at the third quarter checkpoint is ___ m/s. The speed at the finish line is ___ m/s.

- 1.10 - 1.93 - 2.38 - 2.82

Calculate the change in time for each quarter of the track. Record the change in time in Table E of your Student Guide. The change in time for the first quarter is ___ seconds. The change in time for the second quarter is ___ seconds. The change in time for the third quarter is ___ seconds. The change in time for the fourth quarter is ___ seconds.

- 1.39 - 0.79 - 0.64 - 0.54

Calculate the average time the car took to reach each checkpoint. Record the average time in Table D of your Student Guide. The average time to the first quarter checkpoint is ___ seconds. The average time to the second quarter checkpoint is ___ seconds. The average time to the third quarter checkpoint is ___ seconds. The average time to the finish line is ___ seconds.

- 1.39 - 2.18 - 2.88 - 3.36

Use the table to answer the questions. What is the fastest time trial for the first quarter checkpoint? ___ seconds What is the slowest time trial for the first quarter checkpoint? ___ seconds What is the range of times measured for this checkpoint? ___ seconds

- 2.02 - 2.15 - 0.13

Calculate the change in time for each quarter of the track. Record the change in time in Table C of your Student Guide. The change in time for the first quarter is ___ seconds. The change in time for the second quarter is ___ seconds. The change in time for the third quarter is ___ seconds. The change in time for the fourth quarter is ___ seconds.

- 2.07 - 1.09 - 0.95 - 0.81

Calculate the average time it took the car to reach each checkpoint. Record the average times in Table B of your Student Guide. The average time to the first quarter checkpoint is ___ seconds. The average time to the second quarter checkpoint is ___ seconds. The average time to the third quarter checkpoint is ___ seconds. The average time to the finish line is ___ seconds.

- 2.07 - 3.16 - 4.11 - 4.92

You are leaving for a party at your cousin's house in a city that is 150 km away. You will travel at an average rate of 50 km/hr. How long will it take you to arrive? ___ hours If you need to be at the party in 2.5 hours, how fast would you need to drive to get there? ___ km/kh

- 3 - 60

Use the data table on the left to complete the calculations. What is the elapsed time for Trial B? What is the average speed for Trial B?

- 3.0 s - 1.3 m/s

Using the black numbers on the stopwatch to answer the questions. What is the most accurate reading of seconds as indicated by the long second hand? Look at the divisions between 2 and 4. What level of precision does this stopwatch have based on the divisions marked on its face?

- 5.3 s - tenths of seconds

Read the elapsed time on the stopwatch and answer the questions. In which digit is there the least amount of confidence? ___ How many significant figures does this measurement have? ___

- 7 - 4

Use the graph of speed versus time to answer the questions about acceleration. Which of the cars is speeding up? ___ Which of the cars is slowing down? ___ Which of the cars is maintaining a constant speed? ___

- A - C - B

Which statements are part of the safety protocol for this lab experiment? Check all that apply.

- Always wear safety goggles when performing an experiment. - Use caution when constructing the track. - Ensure that the track is clear before releasing cars. - Report all accidents to the teacher.

Based on the time measurements in the table, what can be said about the speed of the car on the lower track as compared to the higher track? _____ How can the reasoning for the above answer be best explained? On the higher track, the elapsed time is _____. Calculate speeds for each track. How much faster was the car on the higher track than the lower track? _____

- Cars travel faster on the higher track. - shorter - 0.56 m/s

Match the measurement with the proper SI unit. Acceleration: Velocity: Distance:

- Meters per second squared - Meters per second - Meters

Use the graph of distance versus time to complete the sentences. The cars on the higher track travel _____ the cars on the lower track, in the same time. This means that the cars on the higher track have a _____ average speed than those on the lower track. This is demonstrated by the _____ of the higher track line being greater than the slope of the lower track line.

- farther than - greater - slope

Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements. In this experiment, the _____ was intentionally manipulated. This was the independent variable. The dependent variable measured was the _____.

- height of the track - speed of the car

The variables for this experiment include the height of the track and the speed of the car. Use the drop-down menus to complete the sentences and identify the independent and dependent variables. The independent variable, or the one that is intentionally manipulated, is ___ The dependent variable, or the one the response is measured in, is ___

- initial height - speed

In this experiment, you will use a track and a toy car to explore the concept of movement. You will measure the time it takes the car to travel certain distances, and then complete some calculations. In the space below, write a scientific question that you will answer by doing this experiment.

How can we change the speed of a toy car on a racetrack to describe the car's motion?

Write a hypothesis about the effect of the racetrack's height on the speed of the car using the format of "if...then...because...." Be sure to answer the lesson question "How can motion be described?"

If the starting height of a sloped racetrack is increased, then the speed at which a toy car travels along the track will increase because the toy car will have a greater acceleration. So, if you get the speed, direction and time, you will get the velocity of the car.

Why does increasing the number of trials increase confidence in the results of the experiment?

Increasing the number of trials reduces the impact of any one imprecise measurement. Using an average value for data points provides a better representation of the true value. Which gives us an average time for all the trials which makes it more accurate.

Do you have a copy of the Student Guide for this lab, which includes the data table?

yes

Obtain a copy of the Student Guide for this lab. Your teacher may provide a copy, or you can click the link to access a copy. Be sure to read the entire Student Guide for this lab. Did you read the Student Guide carefully?

yes

Review data tables A-E in your Student Guide. Did you record all data throughout the virtual lab experiment?

yes