Physics Unit 8 Lesson 1 Test Questions and Answers Graded A+
1. equilibrium a state of balance or rest within a system of forces
2. harmonic motion a regular, repeating oscillation or vibration, such as that of a vibrating piano
string
3. sine wave a geometric representation of the rhythmic pattern of a wave, so called
because it has the look of a sine function
4. harmonic motion. -exchange of energy from potential energy to kinetic energy and back
again.
-loses a little momentum with each period, due to friction and air resistance
5. simple harmonic -frictionless environment and in a perfect vacuum, a pendulum would keep
going forever
-driving force to put the pendulum in motion, then a restoring force to return
the bob to its original position.
6. equilibrium - no actual force in ettect.
-fc won't change during the swinging of the pendulum, so we will disregard
it.
-fpe represents not just gravity, because gravity doesn't change, but the
potential energy of the pendulum. force of gravity pulling on the mass of
the pendulum's bob.
7. amplitude of the pen- maximum displacement from the equilibrium (rest position)
dulum. -aren't raising the pendulum to a position more than 15° from its equilib-
rium
-n A, the force of gravity is at its greatest on the pendulum; therefore, we can
say that the force of gravitational potential energy of the bob is at its highest
fpe=fmax
-e bob is not moving, so it has no acceleration. a=0
-bob has no speed, so v=0
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, Physics Unit 8 Lesson 1 Test Questions and Answers Graded A+
8. pendulum begins Fpe decreases as a and v increase.
moving toward the -point of equilibrium (Position B) a=0 and v=vmax
point of equilibrium, acceleration will have ceased, but the bob will have reached its maximum
velocity
-all of the potential energy of the pendulum will have been converted to
kinetic energy.
-As the pendulum continues moving because of its velocity and mass (its
momentum), it will begin to slow down. As its velocity decreases, the bob
will also experience changes in acceleration.
9. At Position C, cceleration will again cease, as will velocity. At this poin
-process will start all over again, except acceleration and velocity will be in
the opposite direction.
-simple harmonic motion: back and forth motion in an endless, repeating
pattern.
-the total mechanical energy in the process stays the same.
10. calculate period of os- tp=2pie square root of l over g
cillatorillation
11. calculate spring con- F = k x e or k=f/x
stant
12. A position of Equilibrium
in a pendulum means
that there is no actual
force in effect.
13. At maximum ampli- maximum
tude, the potential en-
ergy of a pendulum
is while the ac-
2/6
1. equilibrium a state of balance or rest within a system of forces
2. harmonic motion a regular, repeating oscillation or vibration, such as that of a vibrating piano
string
3. sine wave a geometric representation of the rhythmic pattern of a wave, so called
because it has the look of a sine function
4. harmonic motion. -exchange of energy from potential energy to kinetic energy and back
again.
-loses a little momentum with each period, due to friction and air resistance
5. simple harmonic -frictionless environment and in a perfect vacuum, a pendulum would keep
going forever
-driving force to put the pendulum in motion, then a restoring force to return
the bob to its original position.
6. equilibrium - no actual force in ettect.
-fc won't change during the swinging of the pendulum, so we will disregard
it.
-fpe represents not just gravity, because gravity doesn't change, but the
potential energy of the pendulum. force of gravity pulling on the mass of
the pendulum's bob.
7. amplitude of the pen- maximum displacement from the equilibrium (rest position)
dulum. -aren't raising the pendulum to a position more than 15° from its equilib-
rium
-n A, the force of gravity is at its greatest on the pendulum; therefore, we can
say that the force of gravitational potential energy of the bob is at its highest
fpe=fmax
-e bob is not moving, so it has no acceleration. a=0
-bob has no speed, so v=0
1/6
, Physics Unit 8 Lesson 1 Test Questions and Answers Graded A+
8. pendulum begins Fpe decreases as a and v increase.
moving toward the -point of equilibrium (Position B) a=0 and v=vmax
point of equilibrium, acceleration will have ceased, but the bob will have reached its maximum
velocity
-all of the potential energy of the pendulum will have been converted to
kinetic energy.
-As the pendulum continues moving because of its velocity and mass (its
momentum), it will begin to slow down. As its velocity decreases, the bob
will also experience changes in acceleration.
9. At Position C, cceleration will again cease, as will velocity. At this poin
-process will start all over again, except acceleration and velocity will be in
the opposite direction.
-simple harmonic motion: back and forth motion in an endless, repeating
pattern.
-the total mechanical energy in the process stays the same.
10. calculate period of os- tp=2pie square root of l over g
cillatorillation
11. calculate spring con- F = k x e or k=f/x
stant
12. A position of Equilibrium
in a pendulum means
that there is no actual
force in effect.
13. At maximum ampli- maximum
tude, the potential en-
ergy of a pendulum
is while the ac-
2/6
