OCR A - A Level Physics Test with Verified Answers
What six base units of the SI system are used in A Level What are random errors? - -Measurement errors
Physics? - -metre, kilogram, second, Ampere, that occur due to results varying in an unpredictable way.
Kelvin, Mole
What is the main method for correcting for random errors?
What six base quantities of the SI system are used in A - -Taking repeated measurements and finding the
Level Physics? - -length, mass, time, electric mean.
current, absolute temperature, amount of substance.
What are systematic errors? - -A measurement error
What is the value of the prefix T (tera) - -10¹² that causes the measurements to differ from the true value
by a consistent amount for each measurement.
What is the value of the prefix G (giga) - -10⁹
What is a zero error? - -A systematic error that
arises from an instrument reading reading a non-zero
What is the value of the prefix M (mega) - -10⁶ reading when nothing is being measured.
What is the value of the prefix k (kilo) - -10³ What is an absolute uncertainty? - -The interval
around the measured value within which the true value is
expected to lie.
What is the value of the prefix d (deci) - -10⁻¹
What is a percentage uncertainty? - -The absolute
What is the value of the prefix c (centi) - -10⁻² uncertainty stated as a percentage of the measured value.
How do you combine uncertainties when measurements
What is the value of the prefix m (milli) - -10⁻³
are added or subtracted? - -Add together the
absolute uncertainties.
What is the value of the prefix μ (micro) - -10⁻⁶
How do you combine uncertainties when measurements
are multiplied or divided? - -Add together the
What is the value of the prefix n (nano) - -10⁻⁹
percentage uncertainties.
What is the value of the prefix p (pico) - -10⁻¹² What happens to the uncertainty in a measurement when
it is raised to a power? - -The percentage
uncertainty is multiplied by the power.
What is the accuracy of measurements? - -How
close a measurements are to the true value.
What is a scalar quantity? - -A quantity with
magnitude but no direction.
What is the precision of measurements? - -How
close to each other repeated measurements are.
What is a vector quantity? - -A quantity with
magnitude and direction.
What is measurement error? - -The difference
between the measured value and the true value of the
quantity. When adding two perpendicular vectors what can you use
to find the direction of the resultant? - -Pythagoras'
, OCR A - A Level Physics Test with Verified Answers
Theorem What is represented by the gradient of a velocity-time
graph? - -Acceleration
When adding two perpendicular vectors what can you use
to find the magnitude of the resultant? - - What is represented by the area under a velocity-time
Trigonometry graph? - -Change in displacement
What is vector resolution? - -The process of splitting What is represented by the area under an acceleration-
a vector into two perpendicular components. time graph? - -Change in velocity
What is a resultant vector? - -The sum of two or When can the suvat equations by used? - -When
more individual vectors. there is constant acceleration and motion along a straight
line.
How is the resultant found in a vector diagram when
adding several vectors together? - -Join the vectors What is the effect of mass on the acceleration for an
nose to tail and the resultant is from the tail of the first to object in free-fall? - -None
the nose of the last vector.
What is the relationship between displacement and time
What is displacement? - -The distance of an object for an object falling freely from rest? - -Displacement
from a point in a specific direction (vector) is proportional to time squared (sαt²)
What is velocity? - -Rate of change of displacement What is a projectile - -An object acted upon only by
(vector) ∆s/∆t if constant the force of gravity
What is speed? - -Change in distance traveled per What shape is the path of a projectile? - -Parabolic
unit time (scalar)
What is the initial vertical velocity of an object projected
What is acceleration? - -Rate of change of velocity horizontally? - -Zero
(vector) ∆v/∆t if constant
What angle of projection that results in maximum range -
What are the units of acceleration? - -ms⁻² -45°
What is meant by constant velocity? - -Speed and Ignoring air resistance what is the acceleration of a
direction of motion don't change projectile? - -Always g downwards
What is represented by the gradient of a distance-time How does horizontal velocity vary in projectile motion? -
graph? - -Speed -It is constant
What is represented by the gradient of a displacement- If a projectile returns to its starting height - -Initial
time graph? - -Velocity and final velocities have the same magnitude
What six base units of the SI system are used in A Level What are random errors? - -Measurement errors
Physics? - -metre, kilogram, second, Ampere, that occur due to results varying in an unpredictable way.
Kelvin, Mole
What is the main method for correcting for random errors?
What six base quantities of the SI system are used in A - -Taking repeated measurements and finding the
Level Physics? - -length, mass, time, electric mean.
current, absolute temperature, amount of substance.
What are systematic errors? - -A measurement error
What is the value of the prefix T (tera) - -10¹² that causes the measurements to differ from the true value
by a consistent amount for each measurement.
What is the value of the prefix G (giga) - -10⁹
What is a zero error? - -A systematic error that
arises from an instrument reading reading a non-zero
What is the value of the prefix M (mega) - -10⁶ reading when nothing is being measured.
What is the value of the prefix k (kilo) - -10³ What is an absolute uncertainty? - -The interval
around the measured value within which the true value is
expected to lie.
What is the value of the prefix d (deci) - -10⁻¹
What is a percentage uncertainty? - -The absolute
What is the value of the prefix c (centi) - -10⁻² uncertainty stated as a percentage of the measured value.
How do you combine uncertainties when measurements
What is the value of the prefix m (milli) - -10⁻³
are added or subtracted? - -Add together the
absolute uncertainties.
What is the value of the prefix μ (micro) - -10⁻⁶
How do you combine uncertainties when measurements
are multiplied or divided? - -Add together the
What is the value of the prefix n (nano) - -10⁻⁹
percentage uncertainties.
What is the value of the prefix p (pico) - -10⁻¹² What happens to the uncertainty in a measurement when
it is raised to a power? - -The percentage
uncertainty is multiplied by the power.
What is the accuracy of measurements? - -How
close a measurements are to the true value.
What is a scalar quantity? - -A quantity with
magnitude but no direction.
What is the precision of measurements? - -How
close to each other repeated measurements are.
What is a vector quantity? - -A quantity with
magnitude and direction.
What is measurement error? - -The difference
between the measured value and the true value of the
quantity. When adding two perpendicular vectors what can you use
to find the direction of the resultant? - -Pythagoras'
, OCR A - A Level Physics Test with Verified Answers
Theorem What is represented by the gradient of a velocity-time
graph? - -Acceleration
When adding two perpendicular vectors what can you use
to find the magnitude of the resultant? - - What is represented by the area under a velocity-time
Trigonometry graph? - -Change in displacement
What is vector resolution? - -The process of splitting What is represented by the area under an acceleration-
a vector into two perpendicular components. time graph? - -Change in velocity
What is a resultant vector? - -The sum of two or When can the suvat equations by used? - -When
more individual vectors. there is constant acceleration and motion along a straight
line.
How is the resultant found in a vector diagram when
adding several vectors together? - -Join the vectors What is the effect of mass on the acceleration for an
nose to tail and the resultant is from the tail of the first to object in free-fall? - -None
the nose of the last vector.
What is the relationship between displacement and time
What is displacement? - -The distance of an object for an object falling freely from rest? - -Displacement
from a point in a specific direction (vector) is proportional to time squared (sαt²)
What is velocity? - -Rate of change of displacement What is a projectile - -An object acted upon only by
(vector) ∆s/∆t if constant the force of gravity
What is speed? - -Change in distance traveled per What shape is the path of a projectile? - -Parabolic
unit time (scalar)
What is the initial vertical velocity of an object projected
What is acceleration? - -Rate of change of velocity horizontally? - -Zero
(vector) ∆v/∆t if constant
What angle of projection that results in maximum range -
What are the units of acceleration? - -ms⁻² -45°
What is meant by constant velocity? - -Speed and Ignoring air resistance what is the acceleration of a
direction of motion don't change projectile? - -Always g downwards
What is represented by the gradient of a distance-time How does horizontal velocity vary in projectile motion? -
graph? - -Speed -It is constant
What is represented by the gradient of a displacement- If a projectile returns to its starting height - -Initial
time graph? - -Velocity and final velocities have the same magnitude
