Chapter 8
CHAPTER 8 - Conservation of Energy 1. The potential energy of the spring is zero when the spring is not compressed (x= 0). For the stored potential energy, we have U = ! kxf2 0; 35.0 J = !
6
Circular Motion and Other Applications of Newton's Laws
CHAPTER OUTLINE
6.1 Newton's Second Law Applied to Uniform Circular Motion Nonuniform Circular Motion Motion in Accelerated Frames Motion in t
1.63: Assume each person sees the dentist twice a year for checkups, for 2 hours. Assume 2 more hours for restorative work. Assuming most dentists work less than 2000 hours per year, this gives 2000 h
Uniform and nonuniform motion
Motion Diagram
3. The person is motionless. b. Equally spaced imaes show her moving
at a constant speed.
if? a}; m;
eeﬁL M
6. She is speeding up. d. She is slowing down.
Terminal velocity
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Which of the following is the tendency of an object to maintain its state of motio
Practice: Static and Kinetic Friction
Name:_ Date:_
1. Gwen exerts a 36-N horizontal force as she pulls a 52-N sled across a cement sidewalk at
constant speed. What is the coefficient of kinetic frict
Term 2- Quiz 1
Grade/Cluster
Section
Name
ID
10/ES
Subject
ANSWER KEY
Physics
Date
Duration 45 minutes
Score/30
I-Choose the best answer
[6 marks, 1 each]
1.
2.
T2-Q1
Page 1 of 6
G10-Adv-Physics
3. Ba
terminal velocity
Describe the motion at
each stage of the skydivers
jump:
Explain why her motion is the
way it is (think about the forces):
Stage 1: at the moment of
leaving the plane
Stage 1:
Stage
3
Vectors
CHAPTER OUTLINE
3.1 3.2 3.3 3.4 Coordinate Systems Vector and Scalar Quantities Some Properties of Vectors Components of a Vector and Unit Vectors
ANSWERS TO QUESTIONS
Q3.1 No. The sum of t
2
Motion in One Dimension
CHAPTER OUTLINE
2.1 2.2 2.3 2.4 2.5 2.6 2.7 Position, Velocity, and Speed Instantaneous Velocity and Speed Acceleration Motion Diagrams One-Dimensional Motion with Constant A
1
Physics and Measurement
CHAPTER OUTLINE
1.1 1.2 1.3 1.4 1.5 1.6 1.7 Standards of Length, Mass, and Time Matter and Model-Building Density and Atomic Mass Dimensional Analysis Conversion of Units Est
Chapter 6
CHAPTER 6 - Gravitation and Newton's Synthesis 1. Because the spacecraft is 2 Earth radii above the surface, it is 3 Earth radii from the center. The gravitational force on the spacecraft i
Chapter 5
CHAPTER 5 - Further Applications of Newton's Laws 1. The friction is kinetic, so Ffr = kFN. With constant velocity, the acceleration is zero. Using the force diagram for the crate, we can w
Chapter 9
CHAPTER 9 - Linear Momentum and Collisions 1. We find the force on the expelled gases from F = ?p/?t = (?m/?t)v = (1200 kg/s)(50,000 m/s) = 6.0 107 N. An equal, but opposite, force will be
Chapter 2
CHAPTER 2 - Describing Motion: Kinematics in One Dimension 1. We find the time from average speed = d/t; 15 km/h = (75 km)/t , which gives
t = 5.0 h. 88 km/h.
2. 3.
We find the average s
Chapter 3
CHAPTER 3 - Kinematics in Two Dimensions; Vectors 1. We choose the west and south coordinate system shown. D 2x For the components of the resultant we have W RW = D1 + D2 cos 45 D 2y D 2 =
Chapter 4
1
CHAPTER 4 - Dynamics: Newton's Laws of Motion 1. We convert the units: # lb = (0.25 lb)(4.45 N/lb) ~ 1 N. If we select the bike and rider as the object, we apply Newton's second law to f
Chapter 7
CHAPTER 7 - Work and Energy 1. 2. 3. The displacement is in the direction of the gravitational force, thus W = Fh cos 0 = mgh = (250 kg)(9.80 m/s2)(2.80 m) = 6.86 103 J. The displacement is
Chapter 11
CHAPTER 11 General Rotation 1.
z (a) For the magnitudes of the vector products we have i i = i i sin 0 = 0; k j j = j j sin 0 = 0; j k k = k k sin 0 = 0. y (b) For the magnitudes of the v
Chapter 12
CHAPTER 12 Static Equilibrium; Elasticity and Fracture 1. From the force diagram for the sapling we can write ?Fx = F1 F2 sin 20 F3 cos = 0; 380 N (255 N) sin 20 F3 cos = 0, or F3 c
Falling Objects
or, how cats survive falls from
tall buildings
Lesson objectives
Know: what terminal velocity means
Understand: why falling things reach a terminal
velocity
Be able to: describe and ex