Test bank and solution manual of college physics a strategics approach 3e (2)
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Test bank and solution manual of college physics a strategics approach 3e (2)
Motion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)and at the end a period of slowing to a rest.The graph must match this description. The value of the velocity is zero at the beginning, then It increases, then, during the lime interval when the velocity is constant, the graph will be a horizontal line. Near the end the graph will decrease and end a Test bank and solution manual of college physics a strategics approach 3e (2)t zero.Assess: After drawing vclocity-vcrsus-timc graphs (as well as others), stop and think if It matches the physical situation, especially by checkTest bank and solution manual of college physics a strategics approach 3e (2)
ing end points, maximum values, places where tlie slope is zero, etc. This one passes (hose tests.Q2.2. Reason: (a) The sign conventions for velocity Motion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)egative acceleration means the acceleration of the object is downward. Therefore the upward velocity of the object is decreasing. An example would be a hall thrown upward, before It starts to fail back down. Since It's moving upward, its velocity IS positive. Since gravity is acting on it and the ac Test bank and solution manual of college physics a strategics approach 3e (2)celeration due to gravity is always downward. Its acceleration IS negative.(b)To have a negative vertical velocity means that an object is moving downTest bank and solution manual of college physics a strategics approach 3e (2)
ward. The acceleration due to gravity is always downward, so It is always negative. An example of a motion where both velocity and acceleration arc neMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)y is increasing.lb)D Copyright 2015 Pearson Ixiucation. Inc. All rights resened. This material is protected under all copyright laws ® they currently exist.No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher.449582-2 Chapter 2A Test bank and solution manual of college physics a strategics approach 3e (2)ssess: For vertical displacement, the convention is that upward is positive and downward is negative for both velocity and acceleration.Q2.3. Reason:Test bank and solution manual of college physics a strategics approach 3e (2)
Where the rings arc far apart the tree is growing rapidly. It appears that the nngs arc quite far apart near the center (the origin of the graph), theMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)e physical situation, especially by checking end points, maximum values, places where the slope is zero. etc. This one passes those tests.Q2.4. Reason: Call "up" the positive direction. Also assume that there IS no air resistance. This assumption is probably not true (unless the rock is thrown on th Test bank and solution manual of college physics a strategics approach 3e (2)e moon), but air resistance is a complication that will be addressed later, and for small, heavy items like rocks no air resistance is a pretty good aTest bank and solution manual of college physics a strategics approach 3e (2)
ssumption if the rock isn't going too fast.To be able to draw this graph without help demonstrates a good level of understanding of these concepts. ThMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)ious points during the flight.At the instant the rock leaves the hand it has a large positive (up) velocity, so (he value on the graph at t = 0 needs (0 be a large positive number. The velocity decreases as the rock rises, but the velocity arrow would still point up. So the graph IS still above the Test bank and solution manual of college physics a strategics approach 3e (2)/ axis, but decreasing. At the tippy-top the velocity is zero; that corresponds to a point on the graph where it crosses the t axis. Then as the rockTest bank and solution manual of college physics a strategics approach 3e (2)
descends with increasing velocity (in tile negative, or down, direction), (he graph continues below the t axis. It may not have been totally obvious bMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)ion is that of free fall. The dope of the velocity graph is constant and negative.Assess: Make sure that the graph touches or crosses the I axis whenever the velocity is zero. In this ease, that is only when it reaches (he top of its trajectory and the velocity vector is changing direction from up ( Test bank and solution manual of college physics a strategics approach 3e (2)0 down.It is also worth noting (hat this graph would be more complicated if we were (0 include the time at the beginning when the rock IS being acceleTest bank and solution manual of college physics a strategics approach 3e (2)
rated by the hand. Think about what that would entail.o Copyright 2015 Pearson Education. Inc. All rights reserved. This material is protected under aMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)rom the publisher.Motion in One Dimension 2-3Q2.5. Reason: Let f0 =0 be when you paw the origin, rite other car will pass the origin at a later lime f( and passes you at time t,.Assess: The slope of the position graph is the velocity, and the slope for the faster ear is steeper.Ọ2.6. Reason: Yes. Th Test bank and solution manual of college physics a strategics approach 3e (2)e acceleration vector will point south when the car is slowing down while traveling north.Assess: The acceleration vector will always point in the dirTest bank and solution manual of college physics a strategics approach 3e (2)
ection opposite the velocity vector in straight line motion if the object is slowing down. Feeling good about this concept requires letting go of the Motion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)nd when discussing physics we need to use them precisely.Q2.7. Reason: A predator capable of running at a great speed while not being capable of large accelerations could overtake slower prey that were capable of large accelerations, given enough time. However, it may not be as effective as surprisi Test bank and solution manual of college physics a strategics approach 3e (2)ng and grabbing prey that arc capable of higher acceleration. For example, prey could escape if the safety of a burrow were nearby. If a predator wereTest bank and solution manual of college physics a strategics approach 3e (2)
capable of larger accelerations than its prey, while being slower in speed than the prey, it would have a greater chance of surprising and grabbing pMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)ect air resistance, and thus assume that the ball is in free fall.(11) -g After leaving your hand the ball is traveling up but slowing, therefore the acceleration is down (r.e. negative).(b)-g At the very lop the velocity is zero, but it had previously been directed up and will consequently be direc Test bank and solution manual of college physics a strategics approach 3e (2)ted down, so it is changing direction (Ĩ.C.. accelerating) down.(c)-g before hitting the ground it is going down (velocity is down) and gelling fasterTest bank and solution manual of college physics a strategics approach 3e (2)
, this also constitutes an acceleration down.Assess: As simple as this question is, it is sure to illuminate a student's understanding of the differenMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, a Test bank and solution manual of college physics a strategics approach 3e (2)aves the thrower’s hand. it is in free fall, while in free fall, the acceleration of the rock is exactly the acceleration due to gravity, which has a magnitude g and is downward. The fact that the rock was thrown and not simply dropped means that the rock has an initial velocity when it leaves the t Test bank and solution manual of college physics a strategics approach 3e (2)hrower’s hand. This does not affect the acceleration of gravity, which docs not depend on how the rock was thrown.Motion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, aMotion in one DimensionQ2.I. Reason: The elevator must speed up from rest to cruising velocity. In the middle will be a period of constant velocity, aGọi ngay
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