1) A particle moves along the x-axis with an increasing speed. During the time for which...
1) A particle moves along the x-axis with an increasing speed. During the time for which this occurs, what MAY be the signs of the velocity and acceleration, respectively:
A) positive and zero B) negative and negative C) positive and negative D) negative and zero E) negative and positive
2) After a ball is thrown upward and is in the air, what will its acceleration do?
A) decrease and then increase B) decrease C) increase D) remain the same E) increase and then decrease
What will its speed do?
A) increase and then decrease B) remain the same C) increase D) decrease E) decrease and then increase
3) A particle undergoes a displacement during some time interval. Which operation allows one to compute this displacement?
A) find the slope of the position vs. time graph for the motion.
B) find the slope of the acceleration vs. time graph for the motion
C) compute the area under the acceleration vs. time graph for the motion.
D) compute the area under the velocity vs. time graph for the motion.
E) find the slope of the velocity vs. time graph for the motion.
Homework Answers
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1) A particle moves along the x-axis with an increasing speed.
During the time for which...
A particle moves along the x axis. Its position varies with time acording to the expression x =-4t + 2t2
Average and Instantaneous Velocity A particle moves along the x axis. Its position varies with time acording to the expression x =-4t + 2t2, where x is in meters and t is in seconds. The position-time graph for this motion is shown in the figure. Notice that the particle moves in the negative x direction for the first second of motion, is momentarily at rest at the moment t = 1 s, and moves in the positive x direction at times...
An object's motion is represented by the x vs. t graph shown below Hint: Velocity is...
An object's motion is represented by the x vs. t graph shown below Hint: Velocity is the slope of x vs. t graph, and acceleration is slope of v vs. t graph. 130 points: 5 points each r (s) t (a) a. Draw the corresponding v vs. t graph on the axes provided. b. Draw the corresponding a vs. t graph on the axes provided. c. At what times is the position a maximum (most positive)? At those times, is...
A particle starts from the origin at t = 0 and moves along the positive x axis. A graph of the velocity of the particle as a function of the time is shown in the figure;
A particle starts from the origin at t = 0 and moves along the positive x axis. A graph of the velocity of the particle as a function of the time is shown in the figure; the v-axis scale is set by vs = 6.0 m/s. (a) what is the coordinate of the particle at t = 5.0 s? (b) what is the velocity of the particle at t = 5.0 s? (c) what is the acceleration of the particle...
12. A drag racing car starts from rest at 0 and moves along a straight line...
12. A drag racing car starts from rest at 0 and moves along a straight line with velocity given by v br, where b is a constant. The expression for the distance traveled by this car from its position at t0 is: 13. This graph shows the velocity of a particle as a function of time. During what interval is its displacement negative? v(ms) A)0-2s B) 2s-5s C)5s-9s D) 0-9s E) Its displacement is not negative 12F- t(s) between 0...
Given A position of a particle which moves along a straight line is defined by the...
Given A position of a particle which moves along a straight line is defined by the relation'小64-m» 40, where s is expressed in feet and t in seconds Find a) O b) Or derive the equation of the particle's acceleration as a c) The time at which the velocity will be zero. d) The position of the particle when the velocity is zero. e) The acceleration of the particle when the velocity is zero. t) The displacement of the particle...
11. Review. A particle moves along the x axis. It is initially at the position 0.270...
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The displacement of a particle which moves along the s-axis is given by s = (t-3)exp(-0.6t)‚...
The displacement of a particle which moves along the s-axis is given by s = (t-3)exp(-0.6t)‚ where s is in meters and t is in seconds. Plot the displacement, velocity, and acceleration versus time for the first 20 seconds of motion. Determine the time at which the acceleration is zero?
1. A particle moves in one dimension, and its position vs. time is described by the...
1. A particle moves in one dimension, and its position vs. time is described by the function x0) e (t in seconds, x in meters) (a) At what time(s) is its velocity zero? At what time(s) is its acceleration zero? (b) Make a computer plot(Excel, Matlab or whatever you wish) of x vs. t from 1-o to 5 s. (c) What do you expect to see on the x vs. t graph at the time(s) that v-o? What do you...
What characterizes the velocity-vs-time graph of an object that is experiencing constant acceleration? A. The slope...
What characterizes the velocity-vs-time graph of an object that is experiencing constant acceleration? A. The slope of the graph is constant and non-zero. B. The graph is flat, with zero slope. C. The slope of the graph is positive, and increasing. D. The slope of the graph is negative, and increasing. E. The slope of the graph is negative, and decreasing. F. The slope of the graph is positive, and decreasing.
s posltve and decreasing in magnitude. 12. A particle accelerates uniformly from a speed of 30...
s posltve and decreasing in magnitude. 12. A particle accelerates uniformly from a speed of 30 cm/s to 40 cm/s in 5 s and thereafter moves at a constant speed of 40 cm/s for an additional 3 s. The average speed over this total time interval is A. 35 cm/s. B. 27 cm/s. C. 0.45 cm/s. D. 37 cm/s. E. 73 cm/s. On a graph that shows position on the vertical axis and time on the horizontal axis, a parabolic...
An object's motion is represented by the x vs. t graph shown below Hint: Velocity is the slope of x vs. t graph, and acceleration is slope of v vs. t graph. 130 points: 5 points each r (s) t (a) a. Draw the corresponding v vs. t graph on the axes provided. b. Draw the corresponding a vs. t graph on the axes provided. c. At what times is the position a maximum (most positive)? At those times, is...
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Given A position of a particle which moves along a straight line is defined by the relation'小64-m» 40, where s is expressed in feet and t in seconds Find a) O b) Or derive the equation of the particle's acceleration as a c) The time at which the velocity will be zero. d) The position of the particle when the velocity is zero. e) The acceleration of the particle when the velocity is zero. t) The displacement of the particle...
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s posltve and decreasing in magnitude. 12. A particle accelerates uniformly from a speed of 30 cm/s to 40 cm/s in 5 s and thereafter moves at a constant speed of 40 cm/s for an additional 3 s. The average speed over this total time interval is A. 35 cm/s. B. 27 cm/s. C. 0.45 cm/s. D. 37 cm/s. E. 73 cm/s. On a graph that shows position on the vertical axis and time on the horizontal axis, a parabolic...
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