AQA A Level Physics (Paper 1) LATEST
Study online at https://quizlet.com/_hm0liz
Particle vibration is parallel to the direc-
Longitudinal
tion of wave propagation
Particle vibration is perpendicular to the
Transverse
direction of propagation
a quantity having only magnitude, not
Scalar
direction
A quantity with both magnitude and di-
Vector
rection
When a system is in equilibrium the sum
of anticlockwise moments about a point
principle of moments
equals the sum of the clockwise mo-
ments about the same point
The single point within a body at which
Centre of gravity the entire weight of the body is consid-
ered to act
The constant, maximum velocity of an
object when the resistive forces on it are
Terminal Velocity
equal and opposite to the accelerating
forces
The tension in a spring or wire is pro-
portional to its extension from its natural
Hooke's Law
length, provided the extension is not too
great (before elastic deformation)
A characteristic of a spring which is de-
Spring Constant fined as the ratio of the force affecting the
spring to the displacement caused by it
the force per unit cross-sectional area
Tensile Stress when equal opposing forces act on a
body. UNIT: Pa or Nm^-2.
The turning effect of a force about a point
is defined as the force x the perpendicu-
moment
lar distance from the point to the line of
action of the force UNIT: Nm
Tensile Strain extension per unit length (no unit)
1/9
, AQA A Level Physics (Paper 1) LATEST
Study online at https://quizlet.com/_hm0liz
E=tensile stress/tensile strain (for
Young Modulus
hooke's law region)
the maximum extent of a vibration or os-
Amplitude cillation, measured from the position of
equilibrium
distance between a point on one wave
Wavelength
and the same point on the next wave
the number of waves produced by a
Frequency
source each second
when two or more waves occupy the
same region then the total displacement
superposition
at any one point is the vector sum of their
individual displacements at that point
Waves or wave sources, which have a
Coherence constant phase difference between them
and a similar frequency
This is the rate of flow of electric charge.
Electric current
I = Q/t. Unit: A
the energy converted from electrical po-
tential energy to some other form per
Potential difference
coulomb of charge flowing from between
two points. Unit: volt (V) [= JC^-1].
the energy converted from some other
form (e.g. chemical) to electrical poten-
emf tial energy per coulomb of charge flow-
ing through the source. Unit: volt (V) [=
JC^-1].
the current through a conductor between
Ohm's Law two points is directly proportional to the
voltage across the two points
The resistance of a conductor is the p.d.
(V) placed across it divided by the result-
Electrical Resistance
ing current (I) through it. R = V / IUnit:
ohm (&&&&)VA^-1]
[=
Resistivity
2/9
Study online at https://quizlet.com/_hm0liz
Particle vibration is parallel to the direc-
Longitudinal
tion of wave propagation
Particle vibration is perpendicular to the
Transverse
direction of propagation
a quantity having only magnitude, not
Scalar
direction
A quantity with both magnitude and di-
Vector
rection
When a system is in equilibrium the sum
of anticlockwise moments about a point
principle of moments
equals the sum of the clockwise mo-
ments about the same point
The single point within a body at which
Centre of gravity the entire weight of the body is consid-
ered to act
The constant, maximum velocity of an
object when the resistive forces on it are
Terminal Velocity
equal and opposite to the accelerating
forces
The tension in a spring or wire is pro-
portional to its extension from its natural
Hooke's Law
length, provided the extension is not too
great (before elastic deformation)
A characteristic of a spring which is de-
Spring Constant fined as the ratio of the force affecting the
spring to the displacement caused by it
the force per unit cross-sectional area
Tensile Stress when equal opposing forces act on a
body. UNIT: Pa or Nm^-2.
The turning effect of a force about a point
is defined as the force x the perpendicu-
moment
lar distance from the point to the line of
action of the force UNIT: Nm
Tensile Strain extension per unit length (no unit)
1/9
, AQA A Level Physics (Paper 1) LATEST
Study online at https://quizlet.com/_hm0liz
E=tensile stress/tensile strain (for
Young Modulus
hooke's law region)
the maximum extent of a vibration or os-
Amplitude cillation, measured from the position of
equilibrium
distance between a point on one wave
Wavelength
and the same point on the next wave
the number of waves produced by a
Frequency
source each second
when two or more waves occupy the
same region then the total displacement
superposition
at any one point is the vector sum of their
individual displacements at that point
Waves or wave sources, which have a
Coherence constant phase difference between them
and a similar frequency
This is the rate of flow of electric charge.
Electric current
I = Q/t. Unit: A
the energy converted from electrical po-
tential energy to some other form per
Potential difference
coulomb of charge flowing from between
two points. Unit: volt (V) [= JC^-1].
the energy converted from some other
form (e.g. chemical) to electrical poten-
emf tial energy per coulomb of charge flow-
ing through the source. Unit: volt (V) [=
JC^-1].
the current through a conductor between
Ohm's Law two points is directly proportional to the
voltage across the two points
The resistance of a conductor is the p.d.
(V) placed across it divided by the result-
Electrical Resistance
ing current (I) through it. R = V / IUnit:
ohm (&&&&)VA^-1]
[=
Resistivity
2/9
