Which of the following is true for an object undergoing projectile motion (upward being positive)? The horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g. The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g. The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero. The vertical component of both its velocity and its ac

Which of the following is true for an object undergoing projectile motion (upward being positive)? The horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g. The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g. The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero. The vertical component of both its velocity and its ac

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Motion In Two Dimensions

Section: Chapter Questions

Problem 7OQ: A projectile is launched on the Earth with a certain initial velocity and moves without air...

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A projectile is launched on the Earth with a certain initial velocity and moves without air resistance. Another projectile is launched with the same initial velocity on the Moon, where the acceleration due to gravity is one-sixth as large. How does the range of the projectile on the Moon compare with that of the projectile on the Earth? (a) It is one-sixth as large. (b) It is the same. (c) It is 6 times larger. (d) It is 6 times larger. (e) It is 36 times larger.
A motorist drives south at 20.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.00 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.00-min trip, find (a) the total vector displacement, (b) the average speed, and (c) the average velocity. Let the positive x axis point east.
Assuming air resistance is ignored, which of the following statements is true regarding the acceleration and velocity vectors for a projectile. The vertical velocity component stays constant. The vertical acceleration is zero. Both velocity components stay constant. The horizontal velocity component varies. The horizontal acceleration is zero.
While an object is in projectile motion (with upward being the ty direction) with no air resistance, the horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero. O they component of its velocity remains constant and they component of its acceleration is equal to -g. O the y components of both its velocity and its acceleration remain constant. O the horizontal component of its velocity remains constant and they component of its acceleration is equal to -g. the horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g.
Which statement about a HORIZONTAL projectile is false? The horizontal velocity is constant. The horizontal acceleration is constant. The vertical velocity is constant. The vertical acceleration is constant.
Which of the following statements is incorrect? Acceleration is a rate of change of velocity. Average velocity is the rate at which an object changes its position from one place to another. At constant velocity, the object is moving in a straight line with zero acceleration. At constant velocity, the object is moving in a straight line at a varying speed. The sum of two or more vectors is represented by a resultant vector, .
"Which is an accurate statement for general projectile motion, when the projectile is at the highest point of its trajectory?" Its acceleration is zero. Its velocity is perpendicular to the acceleration. Its velocity and acceleration are both zero. The horizontal component of its velocity is zero.
While an object is in projectile motion (with upward being the +y direction) with no air resistance, O the horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero. O they component of its velocity remains constant and they component of its acceleration is equal to -g. the y components of both its velocity and its acceleration remain constant. O the horizontal component of its velocity remains constant and they component of its acceleration is equal to -g. O the horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g.
A cannon ball is fired with an initial speed of 123 m/s at angle of 60 degrees from the horizontal. Express the initial velocity as a linear combination of its unit vector components. Vo - ( mis) 7 + m/s) ? At the maximum height, the speed of the cannon ball is v= m/s and the magnitude of its acceleration is a- m/s?. The time needed to reach maximum height is t- S. The maximum height reached by the cannon ball is H= m.
The two vectors shown in the figure represent the initial velocity vj and final velocity üf of an object during a trip that took 6.0 s. The magnitude of &; is 24 m/s and the angle 0; between ij and the -x-axis is 45°. The magnitude of üf is to 11 m/s and the angle Of between üf and the +x-axis is 15°. Calculate the magnitude of the average acceleration aaverage during this trip. m/s? daverage = Is it possible to determine whether the acceleration was uniform from the information given in the problem? Yes, because the acceleration is equal to the change in velocity divided by the change in time. O No, because an intermediate velocity is needed to determine whether the acceleration is uniform. No, because there is not enough information to determine the acceleration at every instant during the time interval. O Yes, because the acceleration always points in the same direction according to the figure.
A person on a cliff throws a ball with an initial velocity of 28.4 m/s at an angle of 53.9° above the horizontal. If the initial height of the ball, compared to it impact location is, Y = 15.1 m, what is the maximum height it obtains, and where does it land? (find both as measured from the base of the cliff) Max height = Number |Units Distance, X = Number Units
-A projectile is launched with an initial speed of 41.0 m/s at an angle of 34.0° above the horizontal. The projectile lands on a hillside 3.80 s later. Neglect air friction. (Assume that the +x-axis is to the right and the +y-axis is up along the page.) (a) What is the projectile's velocity at the highest point of its trajectory? magnitude m/s direction Enter a number.° counterclockwise from the +x-axis (b) What is the straight-line distance from where the projectile was launched to where it hits its target?

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		The horizontal component of its velocity remains constant and the horizontal component of its acceleration is equal to -g.
		The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to -g.
		The horizontal component of its velocity remains constant and the vertical component of its acceleration is equal to zero.
		The vertical component of both its velocity and its acceleration remain constant.