PHY 250 SNHU MOD 8 Total Momentum of The System & the Initial Speed Question: Physics Answers 2021

PHY 250 SNHU MOD 8 Total Momentum of The System & the Initial Speed Question: Physics Answers 2021

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PHY 250 SNHU MOD 8 Total Momentum of The System & the Initial Speed Question

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6/26/2021
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
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PHY-150-H5245, Spring 2021
INSTRUCTOR
Module Eight Homework
(Homework)
Margaret DeAntoni
Southern New Hampshire
University
Current Score
QUESTION
1
2
3
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5
6
7
8
9
10
11
12
13
14
POINTS
2/2
0/2
?/1
?/2
?/4
?/4
?/3
?/4
?/1
?/4
?/4
?/4
?/4
?/1
TOTAL SCORE
2/40
5.0%
Due Date
SUN, JUN 27, 2021
11:59 PM EDT
Request Extension
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Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
Assignment Submission & Scoring
Assignment Submission
For this assignment, you submit answers by question parts. The number of submissions remaining
for each question part only changes if you submit or change the answer.
Assignment Scoring
Your best submission for each question part is used for your score.
1.
[2/2 Points]
MY NOTES
DETAILS
PREVIOUS ANSWERS
ASK YOUR TEACHER
OSCOLPHYS2016ACC 8.1.P.004.
PRACTICE ANOTHER
(a) What is the momentum in kg ? m/s of a garbage truck that is 1.40
?
104 kg and is moving at 28.0
m/s? (Enter a number.)
392000
kg ? m/s
(b) At what speed in m/s would an 8.00 kg trash can have the same momentum as the truck? (Enter a
number.)
49000
m/s
?
2.
[0/2 Points]
MY NOTES
DETAILS
PREVIOUS ANSWERS
ASK YOUR TEACHER
OSCOLPHYS2016ACC 8.2.P.018.
PRACTICE ANOTHER
A 0.900 kg hammer is moving horizontally at 7.50 m/s when it strikes a nail and comes to rest after driving
it 1.00 cm into a board.
(a) Calculate the duration of the impact in seconds. (Enter a number.)
0.0026
s
(b) What was the average force in newtons exerted downward on the nail? (Enter a number.)
-2596.1
N
?
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3.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/1 Points]
MY NOTES
DETAILS
OSCOLPHYS2016ACC 8.3.P.023.
ASK YOUR TEACHER
PRACTICE ANOTHER
Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are
moving toward one another, the first having a mass of 180,000 kg and a velocity of 0.300 m/s, and the
second having a mass of 95,000 kg and a velocity of ?0.120 m/s. (The minus indicates direction of
motion.)
What is their final velocity (in m/s)? (Enter a number.)
m/s
?
4.
[?/2 Points]
MY NOTES
DETAILS
OSCOLPHYS2016ACC 8.5.P.032.
ASK YOUR TEACHER
PRACTICE ANOTHER
During an ice show a 55.0 kg skater leaps into the air and is caught by an initially stationary 80.0 kg skater.
(a) What is their final velocity in meters per second assuming negligible friction and that the 55.0 kg
skater?s original horizontal velocity was 4.00 m/s? (Enter a number.)
m/s
(b) How much kinetic energy is lost in joules? (Enter a number.)
J
?
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5.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/4 Points]
DETAILS
MY NOTES
OSCOLPHYS2016ACC 8.1.WA.002.
ASK YOUR TEACHER
PRACTICE ANOTHER
Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 1.2 m/s and a
mass of 0.44 kg. Cart 2 has a mass of 0.67 kg.
(a) If the total momentum of the system is to be zero, what is the initial speed (in m/s) of Cart 2? (Enter
a number.)
m/s
(b) Does it follow that the kinetic energy of the system is also zero since the momentum of the system is
zero?
Yes
No
(c) Determine the system?s kinetic energy (in J) in order to substantiate your answer to part (b). (Enter
a number.)
J
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6.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/4 Points]
MY NOTES
DETAILS
OSCOLPHYS2016 2.8.WA.043.
ASK YOUR TEACHER
An athlete is training on a 100 m long linear track. His motion is described by the graph of his position
vs. time, below.
(a) For each segment of the graph, find the magnitude and direction of the athlete?s velocity.
magnitude vA
direction vA
m/s
?Select?
magnitude vB
direction vB
m/s
?Select?
magnitude vC
direction vC
m/s
?Select?
magnitude vD
direction vD
m/s
?Select?
(b) What are the magnitude and direction of the athlete?s average velocity over the entire 60 s
interval?
magnitude
direction
m/s
?Select?
Additional Materials
Reading
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7.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/3 Points]
DETAILS
MY NOTES
OSCOLPHYS2016ACC 3.4.P.046.
ASK YOUR TEACHER
PRACTICE ANOTHER
A basketball player is running at 4.60 m/s directly toward the basket when he jumps into the air to dunk
the ball. He maintains his horizontal velocity. (For each answer, enter a number.)
(a) What vertical velocity (in m/s) does he need to rise 0.750 meters above the floor?
m/s
(b) How far (in m) from the basket (measured in the horizontal direction) must he start his jump to reach
his maximum height at the same time as he reaches the basket?
m
?
8.
[?/4 Points]
DETAILS
MY NOTES
OSCOLPHYS2016 3.4.P.042.
ASK YOUR TEACHER
PRACTICE ANOTHER
Suppose a soccer player kicks the ball from a distance 33 m toward the goal. Find the initial speed of the
ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be 41? above the
horizontal.
m/s
?
Additional Materials
Reading
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9.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/1 Points]
DETAILS
MY NOTES
OSCOLPHYS2016ACC 4.3.WA.009.
ASK YOUR TEACHER
PRACTICE ANOTHER
An object of mass 0.85 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of
14.1 m/s. Find the magnitude (in N) of the average force acting on the object during the 2.9 ms time
interval. (Enter a number.)
N
?
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10.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/4 Points]
MY NOTES
DETAILS
OSCOLPHYS2016 4.4.WA.022.
ASK YOUR TEACHER
You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.)
(a) Identify the forces acting on the book. (Select all that apply.)
book on hand
hand on book
floor on book
earth on book
(b) For each force you identified in part (a), indicate the direction. (If a force is not applicable, choose
NA.)
(c)
book on hand
?Select?
hand on book
?Select?
floor on book
?Select?
earth on book
?Select?
Identify the forces acting on your hand. (Select all that apply.)
book on hand
hand on book
floor on hand
earth on hand
(d) For each force you identified in part (c), indicate the direction. (If a force is not applicable, choose
NA.)
book on hand
?Select?
hand on book
?Select?
floor on hand
?Select?
earth on hand
?Select?
(e) Identify the forces that form the action-reaction pair as defined by Newton?s third law.
earth on hand
?Select?
hand on book
?Select?
Additional Materials
Reading
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11.
Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/4 Points]
DETAILS
MY NOTES
OSCOLPHYS2016 5.1.WA.004.
ASK YOUR TEACHER
PRACTICE ANOTHER
Mary applies a force of 77 N to push a box with an acceleration of 0.59 m/s2. When she increases the
pushing force to 89 N, the box?s acceleration changes to 0.86 m/s2. There is a constant friction force
present between the floor and the box.
(a) What is the mass of the box in kilograms?
kg
(b) What is the coefficient of kinetic friction between the floor and the box?
Additional Materials
Reading
12.
[?/4 Points]
DETAILS
MY NOTES
OSCOLPHYS2016 6.2.WA.023.
ASK YOUR TEACHER
PRACTICE ANOTHER
A rotating space station is said to create ?artificial gravity??a loosely-defined term used for an acceleration
that would be crudely similar to gravity. The outer wall of the rotating space station would become a floor
for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and
maintain muscle and bone strength more naturally than in non-rotating space environments. If the space
station is 160 m in diameter, what angular velocity would produce an ?artificial gravity? of 9.80 m/s2 at the
rim?
rpm
Additional Materials
Reading
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Module Eight Homework ? PHY-150-H5245, Spring 2021 | WebAssign
[?/4 Points]
13.
DETAILS
MY NOTES
OSCOLPHYS2016 7.2.WA.016.
ASK YOUR TEACHER
PRACTICE ANOTHER
A man does 4,515 J of work in the process of pushing his 3.00 103 kg truck from rest to a speed of v,
over a distance of 25.5 m. Neglecting friction between truck and road, determine the following.
(a) the speed v (in m/s)
m/s
(b) the horizontal force exerted on the truck (in N)
N
Physical Constants
Additional Materials
Reading
14.
[?/1 Points]
DETAILS
MY NOTES
OSCOLPHYS2016ACC 7.6.WA.065.
ASK YOUR TEACHER
PRACTICE ANOTHER
As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h.
?
When the block is released, it slides without friction to the bottom of the ramp, and then continues across a
surface that is frictionless except for a rough patch of width 15.0 cm that has a coefficient of kinetic friction
k = 0.670.
Find h (in m) such that the block?s speed after crossing the rough patch is 2.80 m/s. (Enter a number.)
m
?
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10. [-14 Points]
DETAILS
OSCOLPHYS2016 4.4.WA.022
You hold your physics textbook in your hand. (Assume that no othe
(a) Identify the forces acting on the book. (Select all that apply.)
book on hand
O hand on book
floor on book
O earth on book
HUMMIMMI MUHUMIHIM
(b) For each force you identified in part (a), indicate the direction. (I
book on hand
Select?
hand on book
? Select
floor on book
earth on book
up
down
(c) Identify the forces
NA
O book on hand
ur hand. (Select all that apply.)
O hand on book
O floor on hand
O earth on hand
(d) For each force you identified in part (c), indicate the direction. (If a forc
book on hand
Select? ~
hand on book
Select? ~
TI
coding traininig
earth on book
?Select? v
(c) Identify the forces acting on your hand. (Select
O book on hand
O hand on book
O floor on hand
earth on hand
(0) For each force you identified in part (c), indicate th
book on hand
?Select?
? Select-
hand on book
floor on hand
earth on hand
up
down
e action-reaction pair a
(e) Identify the forces
NA
earth on hand
hand on book
Select
>
>
Additional Materials
Reading
Sut
(Select
O book on hand
O hand on book
O floor on hand
earth on hand
(d)
For each force you identified in part (c), indicate ti
book on hand
?Select? v
hand on book
?Select? V
floor on hand
?Select? V
earth on hand
?Select? v
(e) Identify the forces that form the action-reaction pain
earth on hand Select?
X
hand on book -Select-
M
floor on hand
Additional Materials
floor on book
Reading
book on hand
hand on earth
Submit Answer
11. [-14 Points]
DETAILS
OSCOLPHYS2016 5.1.WA.
1:16
SNHU
C Letterhead (US) ? C?
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coding
coding for nig
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?cna remember
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60
B
D.
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A
20
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30
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60
WITAMIN
(a) For each segment of the graph, find the magnitude and direction of
magnitude
m/s
?Select?
?Select-
VA
direction VA
magnitude ve
direction VB
magnitude vc
direction VC
positive x
negative x
magnitude vo
direction Vo
The magnitude is zero
(b) What are the magnitude and direction of the athlete?s average velocity
magnitude
m/s
direction ?Select?
Additional Materials
Reading

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