Answered: Which of the following is a velocity…

Which of the following is a velocity graph for a positive initial velocity and positive acceleration (both are non-zero)?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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If we apply the above equations to the case of an object that does not change its direction of travel as it moves with constant acceleration, we find that the object: Undergoes a displacement Ax = x- x, . Note that displacement is a positive quantity if x > x, and a negative quantity if x < x,. Has average velocity v = (x - x )/t = (v + vo)/2. Note that velocity has the same sign as displacement. Travels distance d = |Ax| = |x – x,| . Note that distance is always a positive quantity. Has average speed d/t . Note that speed is always a positive quantity. Has constant acceleration a = (v – vo)/t . Acceleration may be positive or negative, depending on how velocity changes. - Xo For the case of an object that does change its direction of travel as it moves with constant acceleration, which of the quantities listed above are different? Question
A jogger jogs from one end to the other of a straight track in 1.08 min and then back to the starting point in 1.53 min. What is the jogger's average speed at the following points? (Assume the track is 100 m long.) a in jogging to the far end of the track (b) coming back to the starting point (c) for the total jog
If a particle increases in speed at a constant rate as it moves in the positive direction along an x axis, which of the following describes a plot of its velocity versus time? O plot has constant positive slope plot has constant negative slope O plot has zero slope
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solve the following exercise
(a) Give two differences between average speed and average velocity. (b) For an object that undergoes some motion starting at one point and ending at different point, what does the average value of the speed (or velocity) tell you about the motion of the object on this trip and what does the instantaneous value of speed (or velocity) tell you about the motion of the object on this trip? (c) On a position versus time graph how do you determine the average velocity and the instantaneous velocity? (d) Illustrate your answer to (c) with a position versus time graph. (e) Why is the instantaneous speed always the magnitude of the instantaneous velocity?
If a particle is traveling in the positive direction along an x axis while it slows, which of the following describes its acceleration? O positive O zero O negative
Draw a motion diagram for the part of the jump where the person is in the air. Indicate an acceleration vector, if the acceleration is not zero.
Can an object have a negative acceleration and be speeding up? If so, describe a possible physical situation and a corresponding coordinate system. If not, explain why not.
You get in your car and drive north, accelerating up to 60mph. Draw your velocity vector and acceleration vector some time during your acceleration. How would these change if you encountered traffic and started to brake?
A tennis ball is thrown so that its initial vertical and horizontal components of velocity at 40 m/s and 20 m/s, respectively. Use a motion diagram to estimate the ball’s total time of flight and the distance it traverse before hitting the ground:?