Week 3 Quiz

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University of New England *

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1010

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Physics

Date

Feb 20, 2024

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docx

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16

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= 0:06:15 remaining Question 1 (1 point) v Saved Identify the time in Figure 2.54 (fa, tb, fc, td , or fe ) at which the instantaneous velocity is (1) greatest, (2) the time at which it is zero, and (3) the time at which it is negative. ta refers to point a on the graph. Figure 2.54 O a) ta, tb, tc O b) th, te, td Quiz Information O c) tc, td, te (® d) ta, td, te
=TI R UNE Online Syllabi » pr bngmspace,une.ed‘u‘ | Confent/1017216/View Week 3 Quiz ' 0:06:12 remaining Question 2 (1 point) v Saved Explain how you can determine the average acceleration over time from a velocity Vversus time graph such as the one in Figure 2.56/ ® a) (vo-vq)/(tp-tq) O b) (vorva)/ltyty) O o wivallts-to) Quiz Information O d) (vatval/ltr-t) Question 3 (1 point) v Saved FECT I LLECEL LR o St
i Week 3 Quiz - PHYS- " 0:06:08 remaining Question 3 (1 point) Saved What is the vertical acceleration of a rock thrown straight upward on the way up? At the top of its flight? On the way down? © a) Negative, Zero, Negative O b) Positive, Zero, Negative @ c) Negative, Negative, Negative O d) Negative, Zero, Positive Quiz Information Question 4 (1 point) + Saved This is the meaning of the y-intercept of the position versus time graph. O a) Initial time +~E00=ENLeRB0e=ES = “ s
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File Edit View History Bookmarks Window Help = 0:06:04 remaining Question 4 (1 point) ' Saved This is the meaning of the y-intercept of the position versus time graph. © a) Initial time b) Initial position ~ ©) Initial velocity d) Initial acceleration Question 5 (1 point) Saved Quiz Information If there is a constant velocity in a situation, which statement is true: (®) 2) The displacement will be constant ‘/7) b) The displacement will either increase or decrease linearly
tax Phy & brightspace.une.o Jcontent/57379)Viey Week 3 Quiz : 0:06:04 remaining X Question 4 (1 point) Saved This is the meaning of the y-intercept of the position versus time graph. © a) Initial time (®) b) Initial position ) ) Initial velocity () d) Initial acceleration Question 5 (1 point) v Saved Quiz Information If there is a constant velocity in a situation, which statement is true: (®) 5) The displacement will be constant () b) The displacement will either increase or decrease linearly
)/ = 0:06:00 remaining Question 5 (1 point) v Saved If there is a constant velocity in a situation, which statement is true: a) The displacement will be constant O b) The displacement will either increase or decrease linearly ) o o i i ) o) The displacement will either increase of decrease quadratically © d) The displacement is not dependent on velocity Question 6 (1 point) / Saved L If an object is thrown straight up and air resistance is negligible, then its speed when it returns to the starting point is the same as when it was released. Is this true for its Quiz Information velocity? @) a) No. The velocity will be greater than when released.
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©®© § OpenstaxCollege Physic *x %‘ bvluhlsp-u.u»_ : " 0:05:56 remaining Question 6 (1 point) v Saved If an object is thrown straight up and air resistance is negligible, then its speed when it returns to the starting point is the same as when it was released. Is this true for its velocity? ® (e {_J a) No. The velocity will be greater than when released. @) (®) b) No. The direction of the velocity will be opposite than when released. (O ) Yes. The velocity will be the same, since the speed s the same. O d) Yes. The velocity will be the same, since thedisplacement s zero. Quiz Information 2 4 Question 7 (1 point) ~ Saved Identify the time or times ( fa, tb, fc, etc.) in Figure 2.57 at which the acceleration is negative. ta refers to point a on the graph. Figure 2.57 <« W MU SRS esc
—— Week 3 QJiz :05:52 remaining X Question 7 (1 point) v Saved Identify the time or times ( ta, tb , fc, etc.) in Figure 2.57 at which the acceleration is negative. ta refers to point a on the graph. Figure 2.57 O a) td, te, th O b) th, te, te, tf, tg Quiz Information ® o ti, t, th, tl O d) te, th. tg RS | flnnn ‘
=i O (Y Paused) 3 48 remaining X Question 8 (1 point) v Saved If an object can slow down at a rate of 0.500 m/s?, how long (in seconds) will it take to come to a stop from an initial velocity of 10 m/s? Question 9 (1 point) Saving... A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life preserver straight down to the victim with an initial velocity of 1.40 m/s and observes that it takes 1.8 s to reach the water. Neglecting air resistance, how high above the water (in meters) wps the preserver released? Quiz Information e Question 10 (1 point) Saved If an object can slow down at a rate of 0.500 m/s2, what distance (in meters) will it take for the object to come to a stop if it has an initial velocity of 10 m/s?
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@ Chrome Filo Edit View History —Bookmarks Profiles .05:44 remaining Question 10 (1 point) v Saved If an object can slow down at a rate of 0.500 m/s?, what distance (in meters) will it take for the object to come to a stop if it has an initial velocity of 10 m/s? Oa) 10m O b) 50m ) 100m O d) 200m Quiz Information Rlestionititipontt e Sosd A graph of velocity versus time is shown for a world-class track sprinter in a 100-m race (Figure 2.67). How long (in seconds) did it take for her to run the first 50 / 1, z D
Agraph of velocity versus time is shown for a world-class track sprinter in a 100-m i s race (Figure 2.67). How long (in seconds) did it take for her to run the first 50 " s Ao 4015116 9 > I 7adiliesi |9 b : H V. o ot o * 10 1 meters? Figure 2.67. dioe o} 10|11} 12 il il [l U a) 425 13|14 (|15 O i T S b) 57s B Quiz Information ®) 0 625
RUESUUIL L& (L PUIliY) vaveu An Olympic-class sprinter starts a race with an acceleration of 4.50 m/s2 . What is 2 i her speed 2.40 s later in m/s? v v | 108 A 4 5 6 R R 7 Question 13 (1 point) v Saved 718 || 9 vl Freight trains can produce only relatively small accelerations and decelerations. What is the final velocity (in m/s) of a freight train that accelerates at a rate of 0.0500 m/s? 10| (11|12 for 8.00 min, starting with an initial velocity of 4.00 m/s? vilv||v e e | 280 J A 13 ({14 (|15 b Question 14 (1 point) v Saved Quiz Information A football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after compressing the padding and his body 0.350 m. What is his deceleration and how long does the collision last? () 2) 80.4 m/s2and 0.0933 s
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T UL L 4L pOINY v Saved ; s . A football player collides with a padded goalpost while running at a velocity of 7.50 i m/s aer cFmes to a full stop after compressing the padding and his body 0.350 m, | What is his deceleration and how long does the collision last? ol 4(|5116 S i v (®)2) -80.4 m/s? and 0.0933 s stal 7 il's || 9 o N e L ) b) -40.2 m/s2 and 0.0933 s N 10| 11|12 @) 2 e o i 7 ) -40.2 m/s2and 0.1866 s ne 14 || 15 3 O o) -804 m/s2 and 01866 5 vilvllv & ! @F Quiz Information Question 15 (1 point) v Saved = YYou throw a ball straight up with an initial velocity of 15.0 m/s. It passes a tree + branch on the way up at a height of 7.00 m. How much additional time will pass Q before the ball passes the tree branch on the way back down? /A | o i i W et ] et St S it St Wt Yo D N
Question 15 (1 point) v Saved You throw a ball straight up with an initial velocity of 15.0 m/s. It passes a tree branch on the way up at a height of 7.00 m. How much additional time will pass before the ball passes the tree branch on the way back down? O a) 0585 ~ Ob) 2495 ®© g 1915 =5 O d) 307s Quiz Information
Correct! uestion 5 2 2 0/1 point \f there is a constant velocity in a situation, which statement is true: ('\/ a) The displacement will be constant L / @ b) The displacement will either increase or decrease linearly (& ) The displacement will either increase of decrease quadratically \\/ d) The displacement is not dependent on velocity w Hide question 5 feedback
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File Edit View History Bodl (Sungsikyung)®l & Correct! 0/ 1 point Question 5 If there is a constant velocity in a situation, which statement is true: @) 3) The displacement will be constant b) The displacement will either increase or decrease linearly ill either increase of decrease quadratically ) The displacement Wi d) The displacement is not dependent on velocity w Hide question 5 feedback Incorrect. The displacement versus time will bo @ Jinear trend for constant velocity.

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