PHY 170 University Physics I
Schedule (Autumn 2014): 11:20 AM12:50 PM, M-T-W-Th, in Byrne 208
Instructor: Dr. Anuj P. Sarma
Office: Byrne 217
Email: asarma@depaul.edu
Office Phone: (773) 325-1373
URL: d2l.depaul.edu
Course Structure and Format
The work of
PHY 170Motion Diagrams
Week 1Thursday, Sep 11Worksheet
Autumn 2014
1 page
Draw motion diagrams for the motions described below.
Remember that motion diagrams must have dots at equally spaced intervals in time to represent
the position of the object as a
PHY 170Homework 7 solutions
Autumn 2014
1. A drum major twirls a 90-cm-long, 440g baton about its center of mass at 100 rpm. What is
the batons rotational kinetic energy?
Solution: Assuming that the baton is a uniform rod whose center of mass is at its ge
PHY 170Homework 4 solutions
Autumn 2014
1. Blocks with masses of 2 kg, 4 kg, and 6 kg are lined up in a row on a frictionless table All
three are pushed forward by a 56 N force applied to the 2 kg block.
Solution: The rst step, as always, is to draw the f
PHY 170Homework 9 solutions
Autumn 2014
1. In the gure, a uniform ladder 12 meters long rests against a vertical frictionless wall. The
ladder weighs 400 N and makes an angle , of 58 with the oor. A man weighing 714 N climbs
slowly up the ladder When he h
PHY 170Homework 8 solutions
Autumn 2014
1. A 2.0 kg, 20 cm diameter turntable rotates at 120 rpm on frictionless bearings. Two 520 g
blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and
stick. What is the turntables
PHY 170Homework 3 solutions
Autumn 2014
1. A supply plane needs to drop a package of food to scientists working at a glacier in Greenland.
The plane ies 130 m above the glacier at a speed of 160 m/s. How far short of the target
should it drop the package?
PHY 170Homework 5 solutions
Autumn 2014
1. The following gure is an incomplete momentum bar chart for a 60 g particle that experiences
an impulse lasting 10 ms.
(a) What was the speed of the particle before the impulse?
Solution: From the graph, we can wo
PHY 170Conservation of Angular Momentum
Week 9Monday, Nov 3Worksheet
Autumn 2014
1. A gure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25
kg.m2 . If the arms are pulled in so the moment of inertia decreases to 1.80 kg.m2
PHY 170Homework 1 solutions
Autumn 2014
1. The gure shows the motion diagram of a drag racer. The camera took one frame every 2 s.
(a) Make a position-versus-time graph for the drag racer.
Solution: This is a simple matter of looking at the motion diagram
PHY 170Homework 2 solutions
Autumn 2014
Due to randomization in Mastering Physics, your numbers might be dierent from those used here.
Therefore, Ive included a statement of the problem for all questions.
1. Nicole throws a ball straight up. Chad watches
PHY 170Angular Momentum
Week 8Thursday, Oct 30Lab Worksheet
Autumn 2014
1. Hold the axle of double wheel supplied to you at arms length.
(a) Ask a group partner to rotate both wheels in the same direction at very high speed. With
both wheels rotating in t
PHY 170 University Physics I
11:20 AM-12:50 PM, M-T-W-Th, in Byrne 208
Instructor: Dr. Anuj P. Sarma
Office: Byrne 217
Phone: (773) 325-1373
e-mail: asarma@depaul.edu
PHY 170
Learning Assistants:
Matt Raymond & Bruce Griffin
Review for Final Examination
PHY 170 University Physics I
11:20 AM-12:50 PM, M-T-W-Th, in Byrne 208
Instructor: Dr. Anuj P. Sarma
Office: Byrne 217
Phone: (773) 325-1373
e-mail: asarma@depaul.edu
PHY 170
Learning Assistants:
Matt Raymond & Bruce Griffin
Review for Final Examination
T
PHY 170Center of Mass
Week 7Thursday, Oct 23Lab Worksheet
Autumn 2014
One of the ways of determining the center of mass of an object is to nd the point about which the
object balances. In this lab, you will investigate the balancing of a meter stick.
1. S
PHY 170Energy
Autumn 2014
Week 5Thursday, Oct 9Questions for Discussion
1. Kinetic energy: Suppose the speed of a particle increases by a factor of 3.
(a) Does its kinetic energy increase or decrease?
(b) By what factor does its kinetic energy increase or
PHY 170Homework 6 solutions
Autumn 2014
1. The three ropes shown in the birds-eye view of the gure are used to drag a crate 2.8 m across
the oor. How much work is done by each of the three forces?
Solution: All we need to do here is calculate the work don
PHY 170Free Fall
Week 2Wednesday, Sep 17Worksheet
Autumn 2014
1 page
In the space below, draw a complete pictorial representation (i.e., a motion diagram with velocity
and acceleration vectors) of the following problem, then solve the problem. When you ar
PHY 170Inelastic Collisions
Week 5Wednesday, Oct 8Lab Worksheet
Autumn 2014
Set up the equipment provided to you to study inelastic collisions by following the instructions below.
Follow the order below to get the equipment to work properly. Ask if you ne
PHY 170Rotational Motion
Autumn 2014
Week 8Wednesday, Oct 29Discussion Worksheet
Atwoods Machine
1. The two blocks in the gure below with masses m1 and m2 respectively are connected by a
rope of negligible mass that passes over a pulley of mass Mp and rad
PHY 170Projectile Motion
Week 3Wednesday, Sep 24Lab Worksheet
Autumn 2014
Projectile motion has a range of applications, from a free throw in basketball to a missile launched
against an enemy. In this lab, we are going to study projectile motion by launch
PHY 170Rotational Motion
Autumn 2014
Week 7Wednesday, Oct 22Discussion Worksheet
The r t z coordinate system
Knights textbook denes an rtz coordinate system to make it easier to deal with rotational motion.
1. Follow instructor prompts to set up the rtz c
PHY 170Dissipative Forces: Drag
Week 9Thursday, Nov 6Lab Worksheet
Autumn 2014
In this lab, you will investigate the falling motion of coee lters.
(a) From a height of 90 cm, drop 1 coee lter and measure the time it takes to hit the oor.
Enter your data i
PHY 170Momentum
Week 6Monday, Oct 13Worksheet
Autumn 2014
Questions for Discussion
A. Rank in order, from most to least, the amount of elastic potential energy (Us )a to (Us )d stored
in each of the springs below. Explain your answer.
B. A spring gun shoo
PHY 170Torque
Week 8Monday, Oct 27Worksheet
Autumn 2014
1. Five forces are applied to a door as shown in the gure below. For each, determine if the
torque about the hinge is positive (+), negative (), or zero. No explanation is required.
F
3
F
1
1 =
2 =
3
PHY 170Gravitation
Week 10Thursday, Nov 13Worksheet
Autumn 2014
On Wednesday (Nov 12, 2014), the Philae lander detached from the Rosetta spacecraft of the European
Space Agency (ESA) and made a historic rst landing on the surface of Comet 67P/ChuryumovGer
PHY 170Free-Body Diagrams
Week 3Thursday, Sep 25Worksheet
Autumn 2014
1. A block is at rest on the oor, as shown below. Draw a free-body diagram for the block.
Identify the type of each force, the object that causes the force, and the means of interaction
PHY 170Momentum
Week 5Monday, Oct 6Lab Worksheet
Autumn 2014
In this lab, you will qualitatively examine aspects of collisions. After completing Chapters 9 and 10,
we should be able to quantitatively deal with these types of collisions. In all the experim
PHY 170Motion Diagrams to x(t) and v(t)
Week 2Monday, Sep 15Worksheet
Autumn 2014
Each motion diagram below shows the location of an object at one second intervals, starting at
t = 0 s. Sketch the corresponding graphs of x(t) and v(t). Be as quantitative