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 Part I of this experiment, the was intentionally manipulated. This was the independent variable. The dependent variable measured was the . In Part II of this experiment, the was intentionally manipulated. This was the independent variable. The dependent variable measured was the .
✔ velocity of the washermass of the washermass of the car
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✔ acceleration of the carnumber of washersmass of the car
Different measurements are expressed in different units. Choose the correct SI units for the following types of measurement. The SI units for measuring the velocity of the car: The SI units for measuring the acceleration of the car: The SI units for measuring force: The SI units for measuring mass:
What is the average velocity of the car over the first 0.25m? m/s What is the average velocity of the car over the second 0.25m? m/s
The acceleration of the car with the data in the table above would bem/s2. If the applied force were cut in half, what do you predict the acceleration would be?m/s2
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Use what you know about mass and how you use it to calculate force in the following situation. If each washer has a mass of 4.9 g, then the mass of two washers in kilograms would be . Given that F = ma, and if 4 washers are attached to the string and car instead of 2, then the applied force on the car will be . Recall a = 10 m/s2
Calculate the average travel time for each distance, and then use the results to calculate. The average time that it takes for the car to travel the first 0.25m is s. The average time to travel just between 0.25 m and 0.50 m is s. Given the time taken to travel the second 0.25 m section, the velocity would be m/s.
If you know the force applied to an object and measure its acceleration, which equation would you use to calculate the object’s mass?
The acceleration due to gravity for any object, including 1 washer on the string, is always assumed to be m/s2. The mass of 3 washers, when converted to kg, is kg. The applied force of 3 washers will increase the applied force on the car to N.
Consider the relationship of the variables in Newton’s second law. In a drag car race, the force applied to the car is doubled by the driver stepping on the gas pedal. The acceleration of the car will . The mass of the car will . The velocity of the car will .
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