Quiz_ Reading_ Particle Kinetics, Force and Acceleration
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3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
1/6
Quiz: Reading: Particle Kinetics, Force and
Acceleration
Due Feb 12 at 11:59pm
Points 14
Questions 14
Available Feb 1 at 12am - May 3 at 11:59pm
Time Limit 45 Minutes
Instructions
Attempt History
Attempt
Time
Score
LATEST
Attempt 1
32 minutes
14 out of 14
Correct answers are hidden.
Score for this quiz: 14 out of 14
Submitted Feb 8 at 1:51pm
This attempt took 32 minutes.
Question 1
1 / 1 pts
parallel to the tangent of the path
perpendicular to the tangent of the path
directed towards the center of curvature of the path
directed away from the center of curvature of the path
The quiz:
Covers the Textbook
material from Module 3 – Module 4 (Chapter 13)
.
Contains 14 multiple-choice and true/false
questions.
Is limited
to 35 minutes
.
Allows
1 attempt
.
Is worth 14 points
.
In cylindrical coordinates, the normal force N
which the path exerts on the particle is always
__________________________.
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3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
2/6
Question 2
1 / 1 pts
a) It deals with the relationship between force acted on the body and the change of motion caused by the
force.
b) It is based on the Newton's second law of motion
c) It deals with the motion of the object without regarding the cause of the motion.
d) a and c are not correct
Question 3
1 / 1 pts
a) the sum of forces acting on that object will not be zero.
b) the object will start accelerating.
c) the object will start moving opposite to the direction of the unbalanced force.
d) the force will cause change in the velocity of the object.
e) all except c can be answers.
f) all phrases (a-d) can be answers.
Question 4
1 / 1 pts
force and acceleration relation.
equation of motion.
the equation of mass and acceleration.
Newton's ±rst law of motion equation.
Question 5
1 / 1 pts
1 N
9.81 N
Which of the following statement(s) is/are not correct about kinetics?
If there is an unbalanced force acting on an object, ______________________.
According to your textbook the equation, F
= m
a
is referred as ___________________________.
According to Newton's law of gravitational attraction, the force of attraction developed between
an object of mass 1 kg that is located at or near the surface of the earth is equal to __________.
3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
3/6
32.2 N
Can't be determined if we don't know the mass of the earth
Question 6
1 / 1 pts
±gure a)
±gure b)
±gure c)
None of them
Question 7
1 / 1 pts
True
False
Yes, The force summation does not include the external forces. Internal forces are equal and opposite and
don't affect the force summation.
Question 8
1 / 1 pts
sum of each particle’s acceleration
the acceleration of the center of mass of the system (which contains the particles)
Figure (a) shows an object of mass m subjected by several forces. Which one of these ±gures is called the
kinetic diagram?
When applying Newton's second law of motion (
Σ
F
= m
a
), both internal and externally applied
forces are included in the force summation.
When applying the equation of motion for a system of n-particles, we write as
Σ
F
= Σ
m
a
=
m
a
The term
a
is called _____________________.
i
i
i
G.
G
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3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
4/6
the acceleration of the largest particle
the acceleration of the smallest particle
a
represents the acceleration of the center of mass of the system of the particles
Question 9
1 / 1 pts
a)
b)
c)
d)
Question 10
1 / 1 pts
tangent to the path
away from the path's center of curvature
towards the paths center of curvature
G
If two forces F
and F
act on an object of mass m to accelerate the object to the -x direction, which of the
following ±gures represent the correct FBD?
1
2
When writing the equation of motion in the normal and tangential coordinate system, the
normal component of the equation of motion is written as
Σ
F
= m
a
. The direction of the a
is
always _______________.
n
n
n
3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
5/6
opposite to the direction of motion
The normal acceleration is always acts in the positive n-direction or towards the path's center of curvature.
Question 11
1 / 1 pts
True
False
This statement is false as friction acts opposite to the direction of motion.
Question 12
1 / 1 pts
23.5 m/s
and downward
40.5 m/s
and downward
30.2 m/s
and upward
20.3 m/s
and downward
Question 13
1 / 1 pts
In dynamics, if there is a friction force acting on an object that in motion, it is always acting in
the direction of the motion.
If the block is pulled by a 200 N force, the magnitude and direction of the acceleration of the block are
___________.
2
2
2
2
3/11/24, 9:44 AM
Quiz: Reading: Particle Kinetics, Force and Acceleration: ENGR240: Dynamics (001)
https://canvas.liberty.edu/courses/601780/quizzes/2671303?module_item_id=60442870
6/6
a
= -1
i
+ 5
j m/s
a
= -6
i
+ 2
j
m/s
a
= -5.01
j
m/s
a
= 6
j
m/s
Question 14
1 / 1 pts
an accelerated force
main force
centripetal force
centrifugal force
This force is called centripetal force and it acts towards the path's center.
Quiz Score: 14 out of 14
If two forces,
F
= (3
i
- 5
j
) N and
F
= (-4
i
+ 10
j
) N act on a 1kg particle, what will be the acceleration
of the particle?
1
2
2
2
2
2
When writing the equation of motion in the normal and tangential coordinate system, the
normal component of the equation of motion is written as
Σ
F
= m
a
. The term Σ
Fn is
referred to as _______________.
n
n
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