The horizontal velocity of a thrown object remains constant after it is hurled if there is no
air resistance. This is because the only force acting on the projectile is gravity which
everyone knows acts straight down.
As a result
Lab: Uniform Circular Motion
Uniform circular motion is defined as the motion of an object travelling at a constant
(uniform) speed on a circular path. There are several terms that can be applied to the
study of uniform circular motion.
Dynamics 3 - Inclines
THEORY FOR INCLINES: An object sliding on an inclined surface moves because
of an unbalanced force. However, unlike a similar object sliding on a horizontal surface,
the gravitational pull is only partially balanced by th
Electric Fields & Electric Charge
1. In a lightning bolt, it is estimated that a charge of -20 C is transferred to the
ground. How many electrons make up the lightning bolt?
2. An electron is placed to the right of a negatively charged object and feels a
Circular Motion Problems
1. A 2.0 kg mass swinging at the end of a 0.50 m string is traveling 3.0 m/s. What is the
a. centripetal acceleration of the mass?
b. centripetal force on the mass?
2. What is the rotational speed in m/s of a person st
1. A 12 V battery causes 2.0 A of current to ow through a light bulb. What is the resistance of
2. In the diagram of a series circuit to the right, suppose R1 and
R2 were light bulbs. If the light bulb at R2 burned out, what
Physics 40S Formula Sheet
v f = vi + at
v f2 = vi2 + 2 ad
! v f + vi
d = vi t + at
d = v f t at 2
fs = s FN
fk = k FN
Magnet - The Word
The word magnet comes from the Greek "magntis lthos"
which means "magnesian stone". Magnesia was an area in
Ancient Greece, in present-day Turkey where deposits of
magnetite have been discovered since antiquity.
Magnetite - Fe3
A d v a n c e d P h y s ic s 3 0 S
Dynamics 2 - Forces at Angles
T H E O R Y F O R A N G L E D F O R C E S: P u llin g o r p u s h in g a n o b je c t w ith a n a n g le d a p p lie d f o rc e
c a u s e s a n o v e ra ll c h a n g e in n o t ju s t th e h
P h y s ic s A d v a n c e d 3 0 S
Dynamics 1 - Friction
W h y is t h e r e f r ic t io n ?
The seemingly smooth surface of an object could be very rough on the microscopic level. When
two objects that are rough on the microscopic level rub together, the
Kinematics Word Problems
For all the questions:
a) Write out all the Big 4 equations
b) Draw a sketch of what is occurring
c) Write out all the variables
d) Identify which equation to use
e) Substitute & solve.
1. A car is stopped at a red lig
Electric Fields More
If more than one charges exists in a region, there will be a net electric field that is the
results of the electric field due to each charge. The net electric field is the vector sum of
the electric fields due to each cha
CHARGES IN A MAGNETIC FIELD!
Use your right hand to determine the direction of force on a moving positively charged
particle in a magnetic eld. With the ngers pointing from south to north (the same
direction as the eld), and the thumb p
Electric Forces & Potential
Electric Forces & Coulomb s Law
1. A charge of -2 x 10-6 C experiences a force of 0.08 N [left]. What is the electric eld at
2. A charge of +3.0 x 10-6 C is 0.25 m away from a charge of -6.0 x 10-6 C.
a. What is the
Projectiles with Angled Initial Velocities
So far, we have considered two-dimensional motion in which the initial velocity has been
exclusively horizontal. But projectiles can be launched above the horizontal as well. What does
Non-symmetrical Parabolic Paths
What does that fancy title mean? Well, it means that you are now going to be looking at
projectile trajectories that do not occur over level ground!
Does this change your basic problem-solving stra
Electric Fields - Uniform Fields
Mass of an electron = 9.11 x 10-31 kg
Mass of a proton = 1.67 x 10-27 kg
1. Between oppositely charged plates, as below, the electric field is adjusted to 270
What force (magnitude & direction) will the fo
1. A boat moves through the water of a river at 10 m/s relative to the water. If the
river is flows at 1.5 m/s, how long does it take the boat to make a round trip
consisting of two 300-m displacements- downstream then upstre
AP Physics B 32S
Constant Acceleration Problems
Using the Big Four
A cyclist is traveling at 12.0 m/s when he applies the brakes and begins to slow. After
4.5 s the cyclist has slowed to 3.0 m/s. What was the cyclists (a) acceleration (assume it
The Story of Charlie Charge
At first we thought that it was some sort of magical property. Fire from the gods. The
Greeks saw it in amber which when rubbed with wool or fur has an effect on nearby
objects. Hence, the name electricity from
Magnetic Induction & Flux
Magnetic ux may be thought of as an amount of magnetic eld passing through an
area. The following diagram depicts a magnetic eld directed away from the observer. A
particular area of the eld has been enclosed in