1.2 Kinematics Flashcards
(17 cards)
What is displacement?
Distance and direction of an object’s change in position from the starting point.
What is speed?
The distance an object travels per unit of time.
What is velocity?
The speed of an object in a particular direction.
What is instantaneous speed?
The rate at which an object is moving at a given moment in time.
What is instantaneous velocity?
The speed and direction of an object at a particular instant.
What is acceleration?
Rate of change of velocity.
What is mean acceleration?
Change in velocity / change in time.
What does the gradient of a displacement-time graph represent?
The gradient of this graph is the velocity.
What does the gradient of a velocity-time graph represent?
The gradient of this graph is the acceleration.
What does the total area under a velocity-time graph represent?
Equal to the change in displacement, treating areas formed by positive velocity as positive and negative velocity as negative.
What is the difference between speed-time and velocity-time graphs?
Visible when velocity becomes negative; speed-time graph never dips below the time axis.
What is the acceleration formula?
∆v / t.
What is Newton’s Second Law?
F = ma.
What is terminal velocity?
The maximum speed a body reaches when the air resistance forces match the weight forces, resulting in no further acceleration.
What are resistive forces?
Forces that oppose the motion of a body, such as air resistance.
What is free fall?
The motion of a body falling under the influence of gravity alone, without any air resistance.
What is equilibrium?
A state where the net force acting on a body is zero, resulting in no acceleration.
