AQA A Level Physics – Mechanics
Questions And Answers 2022\2023
Scalar - ANSWER-A physical quantity that has magnitude only.
Vector - ANSWER-A quantity that has magnitude and direction.
Resultant vector - ANSWER-The vector sum of two or more vectors.
Free-body diagrams - ANSWER-A diagram showing all the forces acting on an
object.
Equilibrium - ANSWER-All forces acting on an object a balanced and cancel
each other out. There is no resultant force.
Mass - ANSWER-The amount of matter in an object.
Weight - ANSWER-A measure of the gravitational force exerted on an object.
Moment - ANSWER-The turning effect of a force around a turning point.
Principle of moments - ANSWER-The sum of the clockwise moments is
equal to the sum of the anticlockwise moments for a body to be in
equilibrium.
Lever - ANSWER-A rigid bar that is free to move around a fixed point.
Couple - ANSWER-A pair of forces of equal size which act parallel to each
other but in opposite directions.
Centre of mass - ANSWER-The point at which the whole mass of the object
appears to act through.
Speed - ANSWER-How fast an object is moving regardless of direction.
Displacement - ANSWER-How far an object's travelled from its starting point
in a given direction (s).
Velocity - ANSWER-Speed in a given direction (u & v).
Acceleration - ANSWER-The rate at which velocity changes (a).
Instantaneous velocity - ANSWER-The speed and direction of an object at a
particular moment in time.
Questions And Answers 2022\2023
Scalar - ANSWER-A physical quantity that has magnitude only.
Vector - ANSWER-A quantity that has magnitude and direction.
Resultant vector - ANSWER-The vector sum of two or more vectors.
Free-body diagrams - ANSWER-A diagram showing all the forces acting on an
object.
Equilibrium - ANSWER-All forces acting on an object a balanced and cancel
each other out. There is no resultant force.
Mass - ANSWER-The amount of matter in an object.
Weight - ANSWER-A measure of the gravitational force exerted on an object.
Moment - ANSWER-The turning effect of a force around a turning point.
Principle of moments - ANSWER-The sum of the clockwise moments is
equal to the sum of the anticlockwise moments for a body to be in
equilibrium.
Lever - ANSWER-A rigid bar that is free to move around a fixed point.
Couple - ANSWER-A pair of forces of equal size which act parallel to each
other but in opposite directions.
Centre of mass - ANSWER-The point at which the whole mass of the object
appears to act through.
Speed - ANSWER-How fast an object is moving regardless of direction.
Displacement - ANSWER-How far an object's travelled from its starting point
in a given direction (s).
Velocity - ANSWER-Speed in a given direction (u & v).
Acceleration - ANSWER-The rate at which velocity changes (a).
Instantaneous velocity - ANSWER-The speed and direction of an object at a
particular moment in time.
