At \(t_1\text{,}\) car A and car B are each located at position \(x_o\) moving forward at speed \(v\text{.}\) At \(t_2\text{,}\) car A is located at position \(2x_o\) moving forward at speed \(3v\text{,}\) while car B is located at position \(2x_o\) but is moving backward at speed \(v\text{.}\)
Is the average velocity of car A between \(t_1\) and \(t_2\)greater than, less than, or equal to the average velocity of car B between \(t_1\) and \(t_2\text{?}\)
Two bumper cars roll toward each other as shown in the figure below. The left side shows the cars before they bounce and the right side shows the cars after they bounce. The vector beside each car represents the velocity of the car at that instant.
Is the magnitude of the average acceleration of the top bumper car greater than, less than, or equal to the magnitude of the average acceleration of the bottom bumper car?
In a race with a total distance of \(d = 100 \mathrm{~m}\text{,}\) the winner is timed at \(t_1 = 11.2 \mathrm{~s}\text{.}\) The second-place finisher’s time is \(t_2 = 11.6 \mathrm{~s}\text{.}\) How far is the second-place finisher behind when the winner crosses the finish line? Assume the velocity of each runner is constant throughout the race.
Identify known and unknown quantities with both a symbol and a number. In general, when a quantity is stated with a number or symbol, that is a known quantity.
Compare your numerical answers to other numbers in the situation. Find at least one other distance to compare it to: should it be bigger or smaller than that other distance? Explain your reasoning.
In physics, you are building models that help describe the real world. As you learn more, these models will become more and more detailed and complicated, with many different parts, including a variety of quantities, assumptions, representations, definitions, principles, key skills, and sensemaking strategies.
Create a memory aid that summarizes what you have learned so far in one page or less. Your goal is to create a reference you can use to quickly and easily find the information (say, during a quiz or exam) to answer the types of activities you have complete so far. How you structure your model is up to you, but organization is important for quickly retrieving information.
