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AQA A Level Physics Mechanics Exam
Questions and Answers 100% Solved
Difference between a scalar and a vector - ✔✔vector has magnitude (size)
and direction, whereas scalar only has magnitude (size).
Examples of scalars - ✔✔speed, mass, time, energy, power
Examples of vectors - ✔✔displacement, velocity, acceleration, force,
weight
Adding perpendicular vectors by calculation - ✔✔draw vectors as a right
angled triangle
use pythagoras' theorem to find magnitude of resultant vector
use trigonometry to calculate the angle of resultant vector (sin=o/h;
cos=a/h; tan=o/a)
Adding vectors
by scale drawing - ✔✔write down scale eg 1cm=2N
draw vectors to correct length and angle to each other "tip to tail"
add the resultant vector line (from original tail to free tip)
, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
measure length and angle of resultant vector
convert length into appropriate quantity (using scale) to find magnitude of
resultant vector
Resolving vectors into two perpendicular components - ✔✔
Resolving components along, and perpendicular to, an inclined slope -
✔✔slide down slop = sine
force dow slope = sintheta
Conditions for equilibrium of two or three coplanar forces acting at a point -
✔✔total resultant force equals zero
or
if the vectors representing the forces are added together they will form a
closed triangle.
Two conditions for a body to remain in equilibrium - ✔✔1. resultant force
acting on body is zero
2. resultant moment about any point is zero
object could be stationary OR travelling at constant velocity
Definition of the moment of a force about a point - ✔✔force multiplied by
the perpendicular distance from the point to the line of action of the force.
AQA A Level Physics Mechanics Exam
Questions and Answers 100% Solved
Difference between a scalar and a vector - ✔✔vector has magnitude (size)
and direction, whereas scalar only has magnitude (size).
Examples of scalars - ✔✔speed, mass, time, energy, power
Examples of vectors - ✔✔displacement, velocity, acceleration, force,
weight
Adding perpendicular vectors by calculation - ✔✔draw vectors as a right
angled triangle
use pythagoras' theorem to find magnitude of resultant vector
use trigonometry to calculate the angle of resultant vector (sin=o/h;
cos=a/h; tan=o/a)
Adding vectors
by scale drawing - ✔✔write down scale eg 1cm=2N
draw vectors to correct length and angle to each other "tip to tail"
add the resultant vector line (from original tail to free tip)
, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
measure length and angle of resultant vector
convert length into appropriate quantity (using scale) to find magnitude of
resultant vector
Resolving vectors into two perpendicular components - ✔✔
Resolving components along, and perpendicular to, an inclined slope -
✔✔slide down slop = sine
force dow slope = sintheta
Conditions for equilibrium of two or three coplanar forces acting at a point -
✔✔total resultant force equals zero
or
if the vectors representing the forces are added together they will form a
closed triangle.
Two conditions for a body to remain in equilibrium - ✔✔1. resultant force
acting on body is zero
2. resultant moment about any point is zero
object could be stationary OR travelling at constant velocity
Definition of the moment of a force about a point - ✔✔force multiplied by
the perpendicular distance from the point to the line of action of the force.
