9/23/2017
MasteringPhysics: Chapter 2
Rocket Height
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 58.8 m/s2 . The
acceleration period lasts for time 10.0 s until the fuel is exhausted. After t
Question 1
2 out of 2 points
Evidence suggests that the crocodiles are more closely related to the birds than the turtles and snakes.
If so, then including the crocodiles but not the birds in the class reptilia, would make the class reptilia
Selected Answ
Answers to discussion questions
1. Briefly explain the leading scientific hypothesis on how life may have originated and provide at least 3 pieces
of evidence supporting it.
Oparins and Haldanes scientific hypothesis on the creation of how life may have o
9/23/2017
MasteringPhysics: Chapter 2
Given Positions, Find Velocity and Acceleration
Learning Goal:
To graph position, velocity, and acceleration of an object given a table of positions vs. time.
The table below shows the x coordinate of a moving object.
9/23/2017
MasteringPhysics: Chapter 2
Direction of Velocity and Acceleration Vector Quantities Conceptual Question
For each of the motions described below, determine the algebraic sign (+, , or 0) of the velocity and acceleration of the object
at the time
9/23/2017
MasteringPhysics: Chapter 2
Tossing Balls off a Cliff
Learning Goal:
To clarify the distinction between speed and velocity, and to review qualitatively one-dimensional kinematics.
A woman stands at the edge of a cliff, holding one ball in each h
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PHY 2053 Exam Two (Summer A 2017) 4 5M / / 5
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1. (a) What property of objects is best measured by their capacitance?
- The ability to store charge
(b) Consider an air-filled charged capacitor. How can its capacitance be increased?
- Decrease the spacing between the plates of the capacitor.
(c) Consid
1. A vertical wire carries a current straight down. To the east of this wire, the magnetic field points
- Towards the south
2. A current carrying loop of wire lies flat on a table top. When viewed from above, the current
moves around the loop in a counter
1. X and Y are two uncharged metal spheres on insulating stands, and are in contact with each other. A
positively charged rod R is brought close to X as shown in Figure (a).
Sphere Y is now moved away from X, as in Figure (b).
What are the final charge st
TEST 2 PHY 2048 MULTIPLE CHOICE PRACTICE QUESTIONS
1. Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5.0
min longer. Compare the work they do.
Answer: Neither of them does any work.
2. A stock person
1)The current definition of the standard kilogram of mass is based on
-the mass a particular object kept in France.
2)The current definition of the standard second of time is based on
-the frequency of radiation emitted by cesium atoms.
3)The current defi
Tutorial 2 Homework
Name
Catching mistakes: Motion graphs
Tutorial section
In the tutorial about velocity and acceleration graphs last week, most of you didnt finish the last
set of questions about a cart going up and down a ramp. The first two pages belo
Tutorial 6 Homework
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SOLUTION
Name
Tutorial section
SUV vs. car
On a test track, a sports utility vehicle (SUV) of mass 2000 kg, traveling at 12 m/s,
hits a stationary car of mass 1000 kg. The car crumples and stays in contact with
the SUV; they
Tutorial 3 Homework
Newton's second law
I.
SOLUTION
Name
Tutorial section
Pushed book
Using your hand to exert a horizontal force, you push a physics textbook across the floor at a steady pace.
The frictional force exerted by the floor on the book opposes
SOLUTION
Tutorial 5 Homework
Name
Pulling together Newton's laws and motion
Tutorial section
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Box o toys.
0 to 2 sec.
Fchild on box
(newtons)
120
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100
4 sec. to 6 sec.
90
time interval
Starting at t = 0, a child pushes horizontally on a
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Circle the correct answer for the following multiple choice questions. There is only one correct
answer(l pt each).
1. *Whot is the internal force on member BD of the truss shown? 15.000 LBS.
a) 15 kips j
b) 7.5 kips B
C) 5 kips A
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
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1) You carry a 7.0 kg bag of groceries 1.2 m above the ground at constant velocity across a 2.4 m room, 1)
. How much
Hawkins 2053 Exam 2 (A)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) A prankster drops a water balloon from the top of a building on an unsuspecting person on the 1) lE
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College of Integrated Science and Humanity
Department of Physics
PHY2049 U03C (53837): Physics with Calculus II, Summer C Term 2017
Course Policies and Procedures
INSTRUCTOR:
Daniel J. Rodriguez
Room: CP 274, Tel: 305-348-3727
E-mail: [email protected]