Net Force and Freebody Diagrams
1. Bob pushes on a crate with a force of 450 N. If the force of friction on the crate is 150 N, what
is the net force on the crate?
2. You and your brother are pushing a car with a dead battery with forces of 20 N and 25 N

=
Power Calculations
=
=
=
1. A motor does 5000 Joules of work in 20 seconds. What is the power of the motor?
2. A machine does 1500 J of work in 30 seconds. What is the power of this machine?
3. A hair dryer uses 72,000 J of work in 60 seconds .What is

6.
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Power Calculations
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90$,
. A motor does 5000 Joules of work in 20 seconds. What is the power of the motor?
A machine does 1500 J of work in 30 seconds. What is the power of this machine?
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1) Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?
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Work Calculations
2) How much work does an elephant do while moving a circus wagon 20 meters with a pulling
force of 200M?
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Potential and Kinetic Energy Calculations J
E E 1 ZEk 25K
= m h = _p h = _;p E = 2 = - = -
E", g m gh mg K 2 mm v m m 1:2
Potential Energy Problems
1. What is the potential energy of a 2 kg potted plant that is on a 1 m high plant stand?
._.-
E? : remain

Lens Equation Worksheet
object height
di image distance
image height
Object distance
do
f is the focal length of the lens
=
+
=
=
Magnification=
-di
do
also
M= hhoi
1. An object is placed 32 cm from a converging (convex) lens that has a focal length o

=
1
=
1
WAVE CALCULATIONS
=
=
=
Solve the following problems.
shown?
?
2. A wave has a period of 2 seconds. What is its frequency?
3. A tuning fork has a frequency of 280 hertz, and the wavelength of the sound produced is 1.5 m.
Calculate the velocity o

H=mcT
Specific Heat Worksheet
H
m=
=
cT
=
1. If 200 grams of water is to be heated from 24.0C to 100.0C to make a cup of tea, how much heat must
be added? The specific heat of water is 4.18 J/gC.
2. 100.0 g of 4.0C water is heated until its temperature i

Name: Date: cfw_1233
1'35"
. /
Refraction 23-2
When light rays cross from one material to another they bend. This bending is called refraction. Refraction is a
useful phenomenon. All kinds of optics, from glasses to camera lenses to binoculars depend on r

Temperature Conversions
TK=TC+273 TC=TK273 Tp= 1.8TC+32 TC:
1 The highest surface temperature on any of the solar systems planets is found on Venus. Partly because
of its nearness to the sun and partly because of the extreme pressure of its atmosphere, th

Ohms Law Calculations
V=IR
R=
V
I
I=
V
R
1. A hair dryer uses a wire that is hot because of the current in it to warm the air that blows through the
dryer. The resistance of this wire is 7.7 . If the current through the wire equals 15.6 A, what is the
vol

. . Attics
Name. Date. 112m :
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. /
Refractlon 23.2
@ 31.!- id. This bending is called refraction. Refraction is 3
Speed OP lialn'l cfw_n -wa+&r :_- 3Xl0 5 nera lenses to binoculars depend on refraction.
lo33
27 memos-"9
_g,_._1, the sh appears

Falling Objects
= +
1
= 2
2
=
2
Distance Fallen
1. A small first-aid kit is dropped by a rock climber. After 2.5s how far has the first-aid kit fallen?
2. A fish is dropped by a pelican. After 2.8s how far has the fish fallen?
3. A small pebble falls o

Name _
Useful conversion factors and equations
1 mile = 5280 ft
1.609 km = 1mile
2.54 cm = 1 inch
Density =
m
1 quart = 946.4 mL
V
1) How many mL are in 0.50 quarts?
2) How many mL are in 0.258 L?
3) How many kL are in 8383 L?
4) How many cm are in 0.783

Name _
Acceleration Calculations
=
=
+
1. Calculate the acceleration of a car (in km/hr/s) that can go from rest to 100 km/hr in 10s.
2. A sprinter starting from rest on a straight, level track is able to achieve a speed of 12 m/s in
6.0s. What is th

Amy
Dr. Musser
PHSC 1013 -005
December 1, 2012
Physics Science
Science and technology are the driving forces of change in our world, especially after the
20th century. They have created a revolution in all area of our lives, including education, food and

1 .
10.
11.
12.
13.
14.
Assignment 1
J
6
How does the Scientific Method differ philosop iéally from other approaches to
"knowing"?
Outline the Scientific Method.
What are the Physical Sciences?
What is acceleration?
Is it possible for an object

Newtons Second Law
=
=
=
=
1. How much force is needed to accelerate a truck with a mass of 2000 kg at a rate of 3 m/s 2?
= = ( ) (
) =
2
2. How much force is needed to accelerate a 68 kg skier at a rate of 1.2 m/s ?
= = ( ) (.
) = .
3. What is t

d
v=
t
Speed Calculations
d=tv
t=
d
v
1. An Olympic athlete runs 200.0 m in 21.34 s. What is her average speed?
2. A cheetah runs 274 m in 8.65 s. What is its average speed?
3. If a swimmer is able to swim 50.0 m in 55.2 s, what is his average speed?
4. W

=
Momentum Calculations
=
=
1. A tractor-trailer truck is traveling down the freeway at 35 m/s. If the mass of the truck is 2000
kg, what is its momentum?
2. If a sports car with a mass of 1000 kg is also traveling down the freeway at 35 m/s, what is it

Name: Date:
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24.1
The Electromagnetic Spectrum
Radio waves, microwaves, visible light, and xrays are familiar kinds of electromagnetic waves. All of these
waves have characteristic wavelengths and frequencies. Wavelength is measured in meter