Quiz_ quizmotion1D
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School
Bergen Community College *
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Course
PHY 222
Subject
Mathematics
Date
Feb 20, 2024
Type
Pages
10
Uploaded by BaronCamelPerson1042
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Quiz: quizmotion1D
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quizmotion1D
Started: Jun 22 at 12:02am
Quiz Instructions
2 attempts
50mins
2 pts
Question 1
6.00 s
4.50 s
3.60 s
4.00 s
9.00 s
An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If
the acceleration is constant, how much time elapses while the auto moves this distance?
2 pts
Question 2
24 m/s
zero
12 m/s
48 m/s
36 m/s
A particle moving along the x
axis has a position given by x
= (24
t
– 2.0
t
) m, where t
is measured in s. What is the
magnitude of the acceleration of the particle at the instant when its velocity is zero?
3
2
2
2
2
1 pts
Question 3
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x
−
x
.
v
−
v
.
x
.
v
.
a
.
The area under a graph of a
vs. t
from t
= t
to t
= t
represents
x
i
f
f
i
f
i
av
av
av
1 pts
Question 4
Instructions
: On occasion, the notation will be a shorthand notation for .
Exhibit 3-2
A child starts at one corner of a cubical jungle gym in a playground and climbs up to the diagonally opposite corner.
The original corner is the coordinate origin, and the x
, y
and z
axes are oriented along the jungle gym edges. The length
of each side is 2 m.
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-2. The child's displacement is:
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2 pts
Question 5
19 m/s
4.7 m/s
10 m/s
34 m/s
17 m/s
A ball thrown vertically from ground level is caught 3.0 s later when it is at its highest point by a person on a balcony
which is 14 m above the ground. Determine the initial speed of the ball.
2 pts
Question 6
+15 m/s
−
15 m/s
+30 m/s
At t
= 0, a particle is located at x
= 25 m and has a velocity of 15 m/s in the positive x
direction. The acceleration of the
particle varies with time as shown in the diagram. What is the velocity of the particle at t
= 5.0 s?
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0
−
1.2 m/s
2 pts
Question 7
The particle remains at rest after t
= 3.0 s.
The particle no longer accelerates after t
= 3.0 s.
The particle can be found at positions x
< 0 m only when t
< 0 s.
All of the above are correct.
None of the above is correct.
A particle moving along the x
axis has a position given by x
= 54
t
−
2.0
t
m. At the time t
= 3.0 s, the speed of the
particle is zero. Which statement is correct?
3
3 pts
Question 8
−
500 km/s
−
550 km/s
−
360 km/s
−
520 km/s
−
275 km/s
A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it
enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes
through the board?
2
2
2
2
2
3 pts
Question 9
Instructions
: On occasion, the notation will be a shorthand notation for .
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35
°
45
°
65
°
55
°
85
°
Exhibit 3-1
The three forces shown act on a particle.
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-1. What is the direction of the resultant of these three forces?
2 pts
Question 10
17
°
73
°
107
°
163
°
100
°
Instructions
: On occasion, the notation will be a shorthand notation for .
If = [10 m, 30
°
] and = [25 m, 130
°
], what is the direction of the sum of these two vectors?
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2 pts
Question 11
3.2
6.3
9.5
18
5
Instructions
: On occasion, the notation will be a shorthand notation for .
A vector,
, when added to the vector
yields a resultant vector which is in the positive y
direction and has a magnitude equal to that of . What is the
magnitude of ?
{\overset{\boldsymbol{\mathit\rightarrow}}{\boldsymbol C}\;=\;3\widehat{\boldsymbol i}\;+\;4\overset{\boldsymbol\hat{}}{\boldsymbol j}}
2 pts
Question 12
3 m
4 m
8 m
2 m
7 m
The position of a particle as it moves along the x
axis is given for t
> 0 by x
= (
t
−
3
t
+ 6
t
) m, where t
is in s. Where is
the particle when it achieves its minimum speed (after t
= 0)?
3
2
2 pts
Question 13
Instructions
: On occasion, the notation will be a shorthand notation for .
If vector is added to vector , the result is . If is subtracted from , the result is . What is the
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5.1
4.1
5.4
5.8
8.2
magnitude of ?
1 pts
Question 14
Instructions
: On occasion, the notation will be a shorthand notation for .
The diagram below shows 3 vectors which sum to zero, all of equal length. Which statement below is true?
1 pts
Question 15
Instructions
: On occasion, the notation = [
A
, θ
]
will be a shorthand notation for .
Exhibit 3-4
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1000 m.
1732 m.
2000 m.
6298 m.
8000 m.
The diagram below shows the path taken by a sailboat tacking sideways because it cannot sail directly into the wind.
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-4. The total distance it travels is
3 pts
Question 16
17 m
21 m
18 m
27 m
31 m
A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from
the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball
and stone pass each other?
3 pts
Question 17
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53 m
41 m
57 m
46 m
37 m
An object is thrown downward with an initial (
t
= 0) speed of 10 m/s from a height of 60 m above the ground. At the
same instant (
t
= 0), a second object is propelled vertically upward from ground level with a speed of 40 m/s. At what
height above the ground will the two objects pass each other?
3 pts
Question 18
35 m/s
25 m/s
30 m/s
21 m/s
17 m/s
An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height
above its launch point. What is the initial (launch) speed of the object?
1 pts
Question 19
Joan has run a greater distance and her displacement is greater than Mike's.
Mike has run a greater distance and his displacement is greater than Joan's.
Joan has run a greater distance, but her displacement is less than Mike's.
Mike has run a greater distance, but his displacement is less than Joan's.
Mike has run a shorter distance, and his displacement is less than Joan's.
Two children start at one end of a street, the origin, run to the other end, then head back. On the way, back Joan is
ahead of Mike. Which statement is correct about the distances run and the displacements from the origin?
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1 pts
Question 20
The position of an object at equal time intervals is shown below:
Which graph below correctly represents position versus time for this object?
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