PHYS2050
Fall 2013
Dr. Paulius
Exam 2
Homecoming Edition
Name:_
Be sure to show all your work. No credit will be given for a correct answer without the work to show how it was
derived. Be sure to include units on your answer.
1) (4 pts) A train is acceler
Exam 4
Name: _
Group #: _
Phys 205, Spring 2005
10 pts.
1.Assume that the moon orbits the earth in a circular orbit. Based on the observed
orbital period of 27.3 days, use the gravitational attraction between the earth and
moon to calculate the distance o
birchmeier (b5349) – HW 1 – paulius – (20501)
This printout should have 9 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
001 10.0 points
Consider a piece of string which is placed
along th
Chapter 13  Gravity
Newton's law of gravity
Gravity acts between any two objects that have mass. You can calculate the magnitude of the
force from:
mm
Fg = G 1 2 2
r12
Where G = 6.67x1011 Nm2/kg2 is the universal gravitational constant. (Use it for any
birchmeier (b5349) HW 4 paulius (20501)
This printout should have 10 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
001 (part 1 of 2) 10.0 points
A colony of troglodytes has been in a lengthy
birchmeier (b5349) – HW 3 – paulius – (20501)
This printout should have 12 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
This homework is due Sunday night again.
001 10.0 points
A car tra
birchmeier (b5349) – HW 2 – paulius – (20501)
This printout should have 10 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
001 (part 1 of 2) 10.0 points
The following two questions concern
birchmeier (b5349) – HW 5 – paulius – (20501)
µk Fn
m
0.035(667 N)
=−
67.9918 kg
= −0.34335 m/s2
This printout should have 13 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
REMINDER: Equil
birchmeier (b5349) – HW 6 – paulius – (20501)
This printout should have 14 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
001 10.0 points
An automobile moves at constant speed
down one hil
birchmeier (b5349) HW 6 paulius (20501)
This printout should have 14 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
001 10.0 points
An automobile moves at constant speed
down one hill and up
birchmeier (b5349) – HW 7 – paulius – (20501)
This printout should have 11 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
001 (part 1 of 2) 10.0 points
The vectors A and B are given by
A =
birchmeier (b5349) – HW 7 – paulius – (20501)
This printout should have 11 questions.
Multiplechoice questions may continue on
the next column or page – ﬁnd all choices
before answering.
001 (part 1 of 2) 10.0 points
The vectors A and B are given by
A =
birchmeier (b5349) HW 8 paulius (20501)
This printout should have 13 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
1
004 10.0 points
A 5.3 kg mass is attached to a light cord that
passes ove
birchmeier (b5349) HW 5 paulius (20501)
This printout should have 13 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
REMINDER: Equilibrium means that the
object is not accelerating (sum of the
Chapter 4.4 and 4.5
Circular Motion
Because of its recent budget problems, the
State of Michigan decides to replace its
experienced highway engineers with cheap
college students (namely  YOU!).
Knowing that you have taken physics, they
want you to design
Ch 13 Gravity
Newtons Law of Gravitation
inverse square law
In vector form
m1m2
F12 = G 2 r12
r
sign indicates an attractive force
G is the universal gravitational constant
G = 6.673 x 1011 Nm2 / kg2
Gravitational Potential Energy
for the Earth
Choose th
Exam 3 on Monday
Exam 3 will cover:
Will need Ch 6
Chapter 7, sections 17
Chapter 8 sections 14
Chapter 9, sections 16
A 2.0kg object moving with a velocity of 5.0
m/s in the positive x direction strikes and
sticks to a 3.0kg object moving with a
spe
Chapter 9
Linear Momentum and Collisions
Tony (of mass 60 kg) coasts on his bicycle (of mass 10 kg) at a constant speed
of 5 m/s, carrying a 5 kg pack. Tony throws his pack forward, in the direction of
his motion, at 10 m/s relative to the ground just
bef
Chapter 7
Energy
of
a
System
Group Work Fed Ex Project
Some very nice work!
Winners of the Bonus Extra Credit Were:
Groups 1, 2 and 6
 Solutions included Power Point Slides and Numerical Methods
Question 3 asks for the largest "magnitude" for the dot
Well call the downward object number 1. The upward object number 2. In
general we have,
y = yi + vi t
12
gt
2
(1)
For objects under free fall (a = g ). Then we simply set up this equation for
each object.
An object is thrown downward with an initial speed
birchmeier (b5349) HW 1 paulius (20501)
This printout should have 9 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
001 10.0 points
Consider a piece of string which is placed
along the xaxis.
Ch 3 Vectors
Answer = a
II
I
III
IV
Vector Addition Example Collecting
geological samples
A geophysicist begins a collecting data from various
sites. She starts off at her car and walks 40 km
southwest from her car. She stops and sets up her tent
for the
birchmeier (b5349) HW 2 paulius (20501)
1
This printout should have 10 questions.
Multiplechoice questions may continue on
the next column or page nd all choices
before answering.
A car starts from rest and accelerates for 8 s
with an acceleration of 2
Physics I
Chapter 2 motion in one direction

Mechanics  the study of motion or no motion
Kinematics Study of motion w/o regard to cause
Dynamics Study causes of the motion (i.e, study of forces)
For now


Limit study to 1 dimension (i.e motion in a st