0. Which is the most accurate plot of velocity versus time for the braking car?a.Velocity v. Time Graph for the Braking Carс.Velocity v. Time Graph for the Braking Car303025252020151510105.0.5 1 1.5 2 2.5 3 3.5 4 4.50.0.5 1 1.5 2Time (s)2.5 3 3.5 4 4.5Time (min)Velocity v. Time Graph for the Braking Carb.d.Velocity v. Time Graph for the Braking Car303025252020151510105.0.0.5 1 1.5 2 2.5 3 3.5 4 4.50.0.5 1 1.5 2 2.5 3 3.5 4 4.5Time (s)Time (s)Velocity (m/s)Velocity (m/s)Velocity (m/s)Velocity (m/s)

0. Which is the most accurate plot of velocity versus time for the braking car? Velocity v. Time Graph for the Braking Car a. Velocity v. Time Graph for the Braking Car с. 30 30 25 25 20 20 15 15 10 10 5. 4 4.5 0.5 1 1.5 2 2.5 3 3.5 Time (s) 0.5 1.5 2 2.5 3 3.5 4 4.5 Time (min) b. Velocity v. Time Graph for the Braking Car d. Velocity v. Time Graph for the Braking Car 30 30 25 25 20 20 15 15 10 10 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Time (s) 0. 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Time (s) Velocity (m/s) Velocity (m/s) Velocity (m/s) Velocity (m/s)

0. Which is the most accurate plot of velocity versus time for the braking car? Velocity v. Time Graph for the Braking Car a. Velocity v. Time Graph for the Braking Car с. 30 30 25 25 20 20 15 15 10 10 5. 4 4.5 0.5 1 1.5 2 2.5 3 3.5 Time (s) 0.5 1.5 2 2.5 3 3.5 4 4.5 Time (min) b. Velocity v. Time Graph for the Braking Car d. Velocity v. Time Graph for the Braking Car 30 30 25 25 20 20 15 15 10 10 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Time (s) 0. 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Time (s) Velocity (m/s) Velocity (m/s) Velocity (m/s) Velocity (m/s)

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 26CQ: (a) Explain how you can use the graph of position versus time in Figure 2.54 to describe the change...

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An object that moves in one dimension has the velocity-versus-time graph shown in Figure P2.52. At time t = 0, the object has position x = 0. a. At time t = 5 s. is the acceleration of the object positive, negative, or zero? Explain. b. At time t = 8 s, is the object speeding up, showing down, or moving with constant speed? Explain. c. Write an expression for the position of the object as a function of time. Explain how you use the graph to obtain your answer. d. Use your expression from part (c) to determine the time (if any) at which the object reaches its maximum position. Check your results by examining the graph. Hint: To get started with finding the maximum of a function, take the derivative and set it equal to zero.
A student writes, "A bird that is diving for prey has a speed of -10 m / s." What is wrong with the student's statement? What has the student actually described? Explain.
(a) Explain how you can determine the acceleration over time from a velocity versus time graph such as the one in Figure 2.56. (b) Based on the graph, how does acceleration change over time?
A student drives a moped along a straight road as described by the velocitytime graph in Figure P2.32. Sketch this graph in the middle of a sheet of graph paper. (a) Directly above your graph, sketch a graph of the position versus time, aligning the time coordinates of the two graphs. (b) Sketch a graph of the acceleration versus time directly below the velocitytime graph, again aligning the time coordinates. On each graph, show the numerical values of x and ax for all points of inflection. (c) What is the acceleration at t = 6.00 s? (d) Find the position (relative to the starting point) at t = 6.00 s. (e) What is the mopeds final position at t = 9.00 s? Figure P2.32
(a) Sketch a graph of acceleration versus time corresponding to the graph of velocity versus time given in Figure 2.57. (b) Identify the time or titles (ta, tb, tc, etc.) at which the acceleration is greatest, (c) At which times is it zero? (d) At which times is it negative?
Standing at the base of one of the cliffs of Mt. Arapiles in Victoria, Australia, a hiker hears a rock break loose from a height of 105 m. He can't see the rock right away but then does, 1.50 s later. (a) How far above the hiker is the rock when he can see it? (b) How much time does he have to move before the rock hits his head?
. (a) Draw an accurate graph of the speed versus time for the train Problem 24. (b) Draw an accurate graph of the distance versus time for the train in Problem 24.
(a) Explain how you can use the graph of position versus time in Figure 2.54 to describe the change in velocity over time, Identify (b) the time (ta, tb, tc, td, or te) at which the instantaneous velocity is greatest, (c) the time at which it is zero, and (d) the time at which it is negative,
A speedboat travels in a straight line and increases in speed uniformly from i = 20.0 m/s to f = 30.0 m/s in displacement x of 200 m. We wish to find the time interval required for the boat to move through this displacement, (a) Draw a coordinate system for this situation, (b) What analysis model is most appropriate for describing this situation? (c) From the analysis model, what equation is most appropriate for finding the acceleration of the speedboat? (d) Solve the equation selected in part (c) symbolically for the boats acceleration in terms of i, f, and x. (e) Substitute numerical values lo obtain the acceleration numerically. (f) Find the time interval mentioned above.
A student drives a moped along a straight road as described by the velocity-versus-time graph in Figure P2.12. Sketch this graph in the middle of a sheet of graph paper. (a) Directly above your graph, sketch a graph of the position versus time, aligning the time coordinates of the two graphs. (b) Sketch a graph of the acceleration versus time directly below the velocity-versus-time graph, again aligning the time coordinates. On each graph, show the numerical values of x and ax for all points of inflection. (c) What is the acceleration at t = 6.00 s? (d) Find the position (relative to the starting point) at t = 6.00 s. (e) What is the mopeds final position at t = 9.00 s? Figure P2.12
A dolphin in an aquatic show jumps straight up out of the water at a velocity of 13.0 m/s. (a) List the knowns in this problem. (b) How high does his body rise above the water? To solve this part, first note that the final velocity is now a known and identify its value. Then identity the unknown, and discuss how you chose the appropriate equation to solve for it. After choosing the equation, show your steps in solving for the unknown, checking units, and discuss whether the answer is reasonable. (c) How long is the dolphin in the air? Neglect any effects due to his size or orientation.
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