PHY 2053 Exam I (Spring 2007)
Your name , Panther ID
(Last) {First}
{You have solve Prob. I and 6 of rest 7 problems)
1. (10 points) A velocity vector V. has a magnitude of40.0 ms and points in a direction 300° below the x axis.
A second velocity vector
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1
MODELS, MEASUREMENTS, AND VECTORS
Answers to Multiple-Choice Problems
1. B
2. A 3. C
4. A 5. B
6. A 7. B
8. D 9. C
10. C
11. B
12. B
13. D
Solutions to Problems
1.1. Set Up: We know the following equalities: 1 mg 5 1023 g; 1 mg 5 1026 g; 1 kilohms 5 100
Chapter 8
Potential Energy and Conservative Forces
Answers to Even-numbered Conceptual Questions
2.
As water vapor rises, there is an increase in the gravitational potential energy of the
system. Part of this potential energy is released as snow falls ont
Chapter 17
Phases and Phase Changes
Answers to Even-numbered Conceptual Questions
2.
Carbon is monatomic, whereas oxygen is diatomic. Therefore, one mole of oxygen has
twice as many atoms as one mole of carbon.
4.
The bubble wrap is more effective on a wa
Chapter 4
Two-Dimensional Kinematics
Answers to Even-numbered Conceptual Questions
2.
The y component of velocity is first positive and then negative in a symmetric fashion.
As a result, the average y component of velocity is zero. The x component of velo
Chapter 5
Newtons Laws of Motion
Answers to Even-numbered Conceptual Questions
2.
As the dog shakes its body, it starts water in its fur moving in one direction. When it
then begins to shake its body in the opposite direction, much of the water continues
Chapter 7
Work and Kinetic Energy
Answers to Even-numbered Conceptual Questions
2.
False. Any force acting on an object can do work. The work done by different forces
may add to produce a greater net work, or they may cancel to some extent. It follows
tha
Chapter 3
Vectors in Physics
Solutions to Even-numbered Conceptual Questions
r
r r
r
Vectors , , and are all equal to one another. Also, vector is the same as vector
J
A G
I
r
L
.
2.
4.
No. The component and the magnitude can be equal if the vector has o
Chapter 2
One-Dimensional Kinematics
Answers to Even-numbered Conceptual Questions
2.
An odometer measures the distance traveled by a car. You can tell this by the fact that
an odometer has a nonzero reading after a round trip.
4.
No. After one complete o
Chapter 14
Waves and Sound
Answers to Even-numbered Conceptual Questions
2.
Waves passing through a field of grain are longitudinal waves the motion of each stalk
of grain is in the same direction as the motion of the wave itself.
4.
This wave is longitud
Chapter 11
Rotational Dynamics and Static Equilibrium
Answers to Even-numbered Conceptual Questions
2.
As a car brakes, the forces responsible for braking are applied at ground level. The
center of mass of the car is well above the ground, however. Theref
Chapter 16
Temperature and Heat
Answers to Even-numbered Conceptual Questions
2.
No. The Kelvin temperature is always 273.15 degrees greater than the Celsius
temperature.
4.
No. Heat is not a quantity that one object has more of than another. Heat is the
Chapter 12
Gravity
Answers to Even-numbered Conceptual Questions
2.
A person passing you on the street exerts a gravitational force on you, but it is so weak
(about 10 7 N or less) that it is imperceptible.
4.
(a) We can see from Equation 12-13 that if th
Chapter 10
Rotational Kinematics and Energy
Answers to Even-numbered Conceptual Questions
2.
The angular speed of an object with constant angular acceleration changes linearly with
time. Therefore, at the time t/2 the angular speed of this object is w /2.
Chapter 13
Oscillations About Equilibrium
Answers to Even-numbered Conceptual Questions
2.
The persons shadow undergoes periodic motion, with the same period as the period of
the Ferris wheels rotation. In fact, if we take into account the connection betw
Chapter 9
Linear Momentum and Collisions
Answers to Even-numbered Conceptual Questions
2.
Doubling an objects speed increases its kinetic energy by a factor of four, and its
momentum by a factor of two.
4.
No. For example, suppose object 2 has four times
Chapter 6
Applications of Newtons Laws
Answers to Even-numbered Conceptual Questions
2.
Spinning the wheels is likely to decrease the force exerted by the Jeep. The reason is
that the force exerted by the spinning wheels is kinetic friction, and the coeff
178 Hernandez Kevin H13
Enl-
Work and Energy (mixed levels) Repr. Phys. Expl. Eval. Sum
Due Thursday, April 2, 2015 at 12:40 pm Forces
0 Z 13" 2 m5
- Friction fk I ,ltkiV, f3 3 ,uSN
0 Air drag F3 2 D112
Work and Kinetic Energy
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Exam
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which cellular protein is found in tight junctions?
A) occludins
B) tubulin
C) connexons
Answer: A
Explanation:
D) cadherins
E) dynein
A)
FINAL EXAM REVIEW
SOLUTIONS TO TAKE HOME PRACTICE TEST
2012 Clutch Tutoring, LLC.
Reproduction prohibited.
1|P a g e
FINAL EXAM REVIEW
SOLUTIONS TO TAKE HOME PRACTICE TEST
2012 Clutch Tutoring, LLC.
Reproduction prohibited.
1|P a g e
E1-1. You throw a billiard ball straight into the air from a height of 1.70 m and at a speed of 6.50 m/s. The moment the ball leaves
2
your hand you start running away, speeding up at a constant acceleration of 4.50 m/s .
(a) How far are you from your sta
E1-1. You throw a billiard ball straight into the air from a height of 1.70 m and at a speed of 6.50 m/s. The moment the ball leaves
2
your hand you start running away, speeding up at a constant acceleration of 4.50 m/s .
(a) How far are you from your sta
SUMMARY
Standards, Units, and Unit Conversions
(Sections 1.3 and 1.4) The fundamental physical quantities of
mechanics are mass, length, and time; the corresponding SI units are
the kilogram 1 kg 2 , the meter 1 m 2 , and the second 1 s 2 , respectively.
2.1. Set Up: Let the + x direction be to the right in the figure.
Solve: (a) The lengths of the segments determine the distance of each point from O:
x A = 5 cm, xB = + 45 cm, xC = + 15 cm, and xD = 5 cm.
(b) The displacement is Dx; the sign of Dx indica
Motion with constant
PROBLEM-SOLVING STRATEGY 2.1
acceleration
SET U P
1. You must decide at the beginning of a problem where the origin of coordinates is and which axis direction is positive. The choices are usually a matter of convenience; it is often e
2.22. Set Up: The instantaneous acceleration is the slope of the y x versus t graph.
Solve: t = 3 s : The graph is horizontal, so ax = 0.
44 m/s 20 m/s
= 6.0 m/s 2 ; ax = 6.0 m/s 2 .
4s
t = 7 s: The graph is a straight line with slope
0 44 m/s
= 11 m/s 2
PROBLEM-SOLVING STRATEGY 1.1
Unit conversions
Units are multiplied and divided just like ordinary algebraic symbols.
This fact gives us an easy way to convert a quantity from one set of units to
another. The key idea is that we can express the same physic