Lab: Motion

Question 1

What is the fastest time trial for the first quarter checkpoint? [___] seconds

Revolt · Accepted Answer

86625; 86626; 86627; 2.02

Question 2

Sample Response: 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. What did you include in your answer? Check all that apply.It prevents one bad measurement from affecting the outcome of the experiment.It allows one to calculate an average value.The average value is typically a better representation of the true value.

Revolt · Accepted Answer

It prevents one bad measurement from affecting the outcome of the experiment.; It allows one to calculate an average value.; The average value is typically a better representation of the true value.

Question 3

In this experiment, the [___] was intentionally manipulated. This was the independent variable.

Revolt · Accepted Answer

height of the track; Selection 1: height of the track; Selection 2: speed of the car

Question 4

speed of the carheight of the trackdistance traveled

Revolt · Accepted Answer

speed of the car

Question 5

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?

Revolt · Accepted Answer

3; 60

Question 6

[___] km/hr

Revolt · Accepted Answer

60

Question 7

Acceleration: [___]

Revolt · Accepted Answer

Meters per second squared; Selection 1: Meters per second squared; Selection 2: Meters per second; Selection 3: Meters

Question 8

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

Revolt · Accepted Answer

Increasing the number of trials increases confidence because it reduces the impact of random errors or imprecise measurements on the final results. By performing multiple trials, you can calculate an average value, which is generally a more accurate representation of the true value than any single trial. It also allows you to identify and account for outliers.

Question 9

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? [___]

Revolt · Accepted Answer

Cars travel faster on the higher track.; Selection 1: Cars travel faster on the higher track.; Selection 2: shorter; Selection 3: 0.56 m/s

Question 10

In which digit is there the least amount of confidence? [___]

Revolt · Accepted Answer

Part 1: 7; Part 2: 4; 7 (the hundredths digit)

Lab: Motion Answers

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