Kinematics & Motion Flashcards
What is the difference between a vector and scalar quantity?
Vector - described by both magnitude and direction
Scalar - described by only its magnitude
What is displacement?
the overall chance in the position of an object, measurement of change in position from start to finish
measured in meters and direction
What is speed?
the rate of change in position between where the object started and finished
measured in meters per second
What is velocity?
the rate of change of displacement against time
measured in meters per second and direction
What is acceleration?
rate of change of velocity against time
measured in meters per second per second and direction
What are the 3 rules of acceleration?
an object with constant acceleration is changing its velocity by the same amount each second
an object with constant velocity is NOT accelerating
when acceleration and velocity are in the same direction, an object is gaining velocity
What is the difference between deceleration and negative acceleration?
Deceleration - acceleration in the opposite direction of the velocity and always reduces velocity
Negative Acceleration - acceleration in the negative direction and may or may not be deceleration
What does SUVAT stand for?
S - displacement
U - “initial” velocity
V - “final” velocity
A - acceleration
T - time
What are Newton’s 3 Laws of Motion?
1 - “An object at rest will remain at rest, and an object in motion will continue to move straight and at a constant velocity if and only if there is no unbalanced force acting upon that object.”
2 - F = mA
3 - “Every action has an opposite and equal reaction”
Fobject1 + Fobject2 = mA
