Current Electricity
Electricity can be defined as phenomena associated with the movement and/or distribution of
electric charge.
There are two main areas of study in electricity current (dealing with movement) and
static (dealing with distribution).
Curre
Oscillations (Simple Harmonic Motion)
The goal of this section is to investigate the motion of objects that oscillate (go back and forth over the same
path, with an equilibrium position in the middle) due to simple forces, such as the force from a spring
1985 PHYSICS B MECHANICS
2.
Two 10-kilogram boxes are connected by a massless string that passes over a massless, frictionless
pulley as shown above. The boxes remain at rest, with the one on the right hanging vertically and the
one on the left 2.0 meters
Physics Quiz: Series and Parallel Circuits
1. Use the circuit to the right to answer the
following questions (in no particular order).
a. What is the potential difference across
/2
each resistor in the circuit?
A
6.0 V
+
R1 =
100
R2 =
570
R3 =
82
b. Wh
Series and Parallel Circuits
Series Circuits
Resistor 1
So far we have seen simple circuits with one resistor where using Ohms Law
V
I=
R
We have also seen that when two resistors are in series (one after another) and
both resistors are identical, the cur
1982 PHYSICS B MECHANICS
2.
A crane is used to hoist a load of mass m1 = 500 kilograms. The load is suspended by a cable from a
hook of mass m2 = 50 kilograms, as shown in the diagram above. The load is lifted upward at a
constant acceleration of 2 m/s2.
1984 PHYSICS B MECHANICS
1.
A ball of mass M attached to a string of length L moves in a circle in a vertical plane as shown above.
At the top of the circular path, the tension in the string is twice the weight of the ball. At the bottom,
the ball just cl
A simple pendulum consists of a bob of mass 1.8 kg
attached to a string of length 2.3 m. The pendulum is
held at an angle of 30o from the vertical by a light
horizontal string attached to a wall, as shown.
a) On the figure below, draw a free-body
diagram