Physics 101
Homework 3
Due January 21
1. A stone is dropped from the top of a cliff. It hits the ground below after 3.25 s. How high is
the cliff?
Solution:
Choose upward to be the positive direction,
Physics 101
Homework 2
Due January 19
1. Can an object have a varying speed if its velocity is constant? If yes, give examples.
Solution:
By definition, if an object has a constant velocity, then both
Physics 101
Homework 4
Due January 26
1. The force of gravity on a 2-kg rock is twice as great as that on a 1-kg rock. Why then doesnt
the heavier rock fall faster?
Solution: The acceleration of both
Electromagnetism
(electric and magnetic phenomena)
This is about: electric charges, electromagnetic forces,
electromagnetic fields
and
I. Electrostatics
This is about: non-moving electric charges, ele
Linear Motion and Graphical Analysis
Name:
Lab # 2
Class:
Date:
Purpose:
To analyze the position, average velocity, and average acceleration of two objects for any given moment
in time.
Procedures:
Ap
Physics 101
Homework 10
Due March 29
Name
#_
(You must show your work or explain your answers to get full credit, simply
writing a numerical answer is not sufficient. You can type your solutions on th
Physics 101
Homework 6
Due February 23
Name
#_
(You must show your work or explain your answers to get full credit, simply
writing a numerical answer is not sufficient. You can type your solutions on
Physics 101
Homework 9
Due March 22
Name
#_
(You must show your work or explain your answers to get full credit, simply
writing a numerical answer is not sufficient. You can type your solutions on thi
Physics 101
Homework 12
Due April 19
Name
#_
(You must show your work or explain your answers to get full credit, simply
writing a numerical answer is not sufficient. You can type your solutions on th
III. Heat
1. Heat and energy
A little bit of history:
Old theories
Robert von Mayer (1814-1878)
James Joule (1818-1889)
Hermann von Helmholtz (18211894)
Calorie: the amount of heat required to rai
Thermodynamics
I. Temperature
1. Thermal equilibrium. Zeroth law of thermodynamics
a) We need a thermometer
b) Thermal equilibrium
c) Zeroth law:
If C is in thermal equilibrium with both A and B,
then
Oscillations
1. Different types of motion:
Uniform motion
1D motion with constant acceleration
Projectile motion
Circular motion
Oscillations
2. Different types of oscillations:
Periodic oscillations
DYNAMICS
1. Newtons Three Laws
Newtons First Law
Existence of inertial systems of reference
In inertial system of reference, any object acted by no net force remains
at rest or continues its motion al
4. Electric potential
4.1 Electric (electrostatic) potential energy
Compare electric force and gravitational force
F k
q1 q 2
r2
m1m2
r2
F G
Conservative forces
We can introduce potential energy:
Exam
Matter
1. Density:
m
V
Units:
m mass
V volume
1kg / m
3
water 1g / cm 3 1000kg / m 3
Example: Volume of 1.00 kg of iron is 128 cm3. Find density of iron.
3
m 1.00kg 100cm
1.00kg
3
V 128cm 1m
12
Physics 101
Homework 3
Due January 21
Name
#_
You must show your work or explain your answers to get full credit, simply writing a
numerical answer is not sufficient. You can type your solutions on th
Physics 101
Homework 2
Due January 19
Name
#_
(You must show your work or explain your answers to get full credit, simply writing
a numerical answer is not sufficient. You can type your solutions on t
Physics 101
Homework 4
Due January 26
1. The force of gravity on a 2-kg rock is twice as great as that on a 1-kg rock. Why then doesnt
the heavier rock fall faster?
2. Find weight of a 2-kg rock. The
Physics 101
Homework 5
Due January 28
This homework will not be collected and graded; solutions have been posted.
1. A 12.0-kg bucket is lowered vertically by a rope in which there is 163 N of tension
Physics 101
Homework 5
Due January 28
1. A 12.0-kg bucket is lowered vertically by a rope in which there is 163 N of tension at a given
instant. What is the acceleration of the bucket? Is it up or dow
Physics 101
Homework 7
Due February 4
A box of mass 5.0 kg is accelerated from rest by a force across a floor at a rate of
7.0 s. Find the net work done on the box.
2.0 m s 2
for
Solution:
Since the a
Physics 101
Homework 6
Due February 2
1. Suppose a car moves at constant speed along a hilly road. Where does the car exert the
greatest and least forces on the road: (a) at the top of a hill, (b) at
Physics 101
Homework 6
Due February 2
Name
#_
You must show your work or explain your answers to get full credit, simply writing a
numerical answer is not sufficient. You can type your solutions on th
Physics 101
Homework 8
February 9
1. Two railroad cars, each of mass 7650 kg and traveling 95 km h in opposite directions,
collide head-on and come to rest. How much thermal energy is produced in this
4. Distance and displacement
(displacement as an example of a vector)
Example 1: The distance between points A and B
is equal to the distance between A and C.
B
A
In contrast, the displacement from po
10. Free fall
Free fall acceleration: g=9.8m/s2
Using general equations:
at 2
x x0 v0 t
2
v v0 at
2a x x0 v 2 v 02
v
x v0 v
t
2
Substitute:
a g
x y
To derive the following equations:
gt 2
y y 0 v0 t
4. Friction
a) Kinetic friction:
f k k N
fk friction force
N normal force
k coefficient of kinetic friction
b) Static friction:
f s f s max s N
s - coefficient of static friction
k s
1
Example: When
Home Work 8
8-1 In Fig. 28-34, a conducting rectangular solid of dimensions dx = 5.00 m, dy = 3.00
m, and dz = 2.00 m moves at constant velocity v = (20.0m/s)i through a uniform
magnetic field B = (30
The induced emf = A*dB/dt = *(0.06m)^2*6.5x10^-3 T/s = 7.34x10^-5V
Now E*L = emf where L = 2r
So E at a distance r from the solenoid is 7.34x10^-5V /(2*r)
(
)
Physics 101
Homework 20
Due November 2
1. An electric bulb with resistance of 43 is connected to the battery with emf of 9.0 V and
internal resistance 2 . a) Find current, terminal voltage, and power
Physics 101
Homework 6
Due September 12
1. A 10.0-kg box is lowered vertically by a rope in which there is 120 N of tension at a given
instant. What is the acceleration of the bucket? Is it up or down
BIOLOGY 101, Section 1, Spring 2017
MWF- 9:00-9:50 am
Coover 2245
Instructors:
Professor Eric Henderson
[email protected] - best way to contact me
Department:
Genetics, Development and Cell Biology