V A A 0 t 2 4 5 B 2. Two identical objects, A and B, move along straight, parallel, horizontal tracks. The graph above represents the velocity as a function of time for the two objects. a. At approximately which time or times, if any, are the objects moving at the same speed? If the objects are never moving with the same speed during the interval shown, indicate this explicitly. Briefly explain your answer. b. At approximately which time or times, if any, are the objects moving with the same acceleration? If the objects are never moving with the same acceleration during the interval shown, indicate this explicitly. Briefly explain your answer. C. At approximately which time intervals is object B moving at a greater speed than A? If the object B are never moving with the same speed during the interval shown, indicate this explicitly. Briefly explain your answer. d. If Object B has an initial position of Xb = -4.5m and Object A started at the origin, at approximately which time or times, if any, are the objects in the same position? e. In a clear, coherent, paragraph-length response, explain your response to part (d). Be sure to reference and compare the graphed information for both objects A and B.

V A A 0 t 2 4 5 B 2. Two identical objects, A and B, move along straight, parallel, horizontal tracks. The graph above represents the velocity as a function of time for the two objects. a. At approximately which time or times, if any, are the objects moving at the same speed? If the objects are never moving with the same speed during the interval shown, indicate this explicitly. Briefly explain your answer. b. At approximately which time or times, if any, are the objects moving with the same acceleration? If the objects are never moving with the same acceleration during the interval shown, indicate this explicitly. Briefly explain your answer. C. At approximately which time intervals is object B moving at a greater speed than A? If the object B are never moving with the same speed during the interval shown, indicate this explicitly. Briefly explain your answer. d. If Object B has an initial position of Xb = -4.5m and Object A started at the origin, at approximately which time or times, if any, are the objects in the same position? e. In a clear, coherent, paragraph-length response, explain your response to part (d). Be sure to reference and compare the graphed information for both objects A and B.

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1. A motorized toy car moves at a constant velocity of 4 m/s. You start recording its motion at zero time as it passes a point 2 m from the zero-position point. a. Sketch a position vs. time graph for the toy car. Be sure you include appropriate labels and units for each axis. b. How can you find the velocity of the car from the position vs. time graph? c. Write an equation for the graph using the proper variables and units.
How do I solve 55?
A ball is thrown up and it takes 7.00 seconds to reach maximum height. Show the equation that you. a) How fast was it going when I threw it? b) How high up did it go? d) What was the acceleration of the ball going up? Give both magnitude and direction (up or down). Explain. e) What was the acceleration of the ball going down? Give both magnitude and direction (up or down). Explain. f) When was the ball speeding up and when was it slowing down? Explain.
Include a picture or description of your coordinate system (origin, positive direction).
Write the actual function that you expect the velocity to obey as a function of time (recall that the initial velocity was 17 m/s). Your function should be a function of time (i.e. the t variable should be left as an independent variable) but all other values should be filled in with numbers. Based on your answer above, what type of curve would you expect the position vs. time function to obey? i.A constant (horizontal) curve? ii.A linear curve? iii.A quadratic (parabolic) curve? iv.Another type of curve, such as cubic, exponential, sine, square root, etc...? Circle an answer from above and explain how you use your answer to the above question and the relationship between position and velocity to arrive at your conclusion.
Coasting due West on your bicycle at 9.6 m/s, you encounter a sandy patch of road 6.7m across. When you leave the sandy patch your speed has been reduced by 3.8m/s to 5.8 m/s. a. Assuming the sand causes a constant acceleration, what was the bicycle’s acceleration in the sandy patch? Give both the magnitude and direction. b. How long did it take to cross the sandy patch? c. Suppose you enter the sandy patch with a speed of only 7.6 m/s. Is your final speed in this case 3.4m/s, more than 3.4m/s, or less than 3.4 m/s? Explain.
You measure the motion of a dynamics cart using a motion sensor. You then plot the cart’s position vs. time and velocity vs. time. The best way of finding the average acceleration of the cart is to find: a. the y-intercept of the position vs. time plot. b. the y-intercept of the velocity vs. time plot. c. the slope of the position vs. time plot d. the slope of the velocity vs. time plot. e. none of the above
An object moves in one dimension, and its velocity versus time is shown in the graph. Express your answers in m/s2. A. What is the average acceleration between the times 0 s and 20 s? B. What is the average acceleration between the times 20 s and 50 s? C. What is the average acceleration between the times 50 s and 70 s? D. What is the average acceleration between the times 0 s and 100 s?
I know the answer is c but can you please explain why
Conclusion: Write a single paragraph describing the how the velocity of the car changes as time passes. Be sure to include your equation and the acceleration in your description.
include a picture or description of your coordinate system (origin, positive direction).