Dynamics Flashcards
Scalar quantity
definition
A quantity that only requires magnitude
Vector quantity
definition
A quantity that requires both magnitude and direction
What type of quantity is speed?
question
Scalar
What type of quantity is mass?
question
Scalar
What type of quantity is force?
question
Vector
What type of quantity is displacement?
question
Vector
Speed
equation
distance/ time
Velocity
equation
displacement/ time
scalars
Acceleration
equation
Change in speed/ time
vectors
Acceleration
Equation
Change in velocity/ time
Resultant force
definition
The sum/ total of all the forces acting upon an object
Average speed
equation
Total distance/ total time
Acceleration
Definition
The rate of change in speed
Newton’s First Law
Definition
An object at rest will remain at rest unless acted upon by a resultant force
Newton’s Second Law
Force
‘Equation’
Mass x Acceleration
F=ma
What does a Free Body Diagram do?
It shows all of the forces acting on a body to scale
Newton’s Second Law
if a resultant force acts on an object, it will accelerate in the direction of the force
Newton’s Third Law
When Body A exerts a force on Body B, then Body B exerts on Body A a force that is either:
* Equal
* Opposite in direction
* Of the same type
Weight
Equation
Mass x Gravitational field strength
What is the Gravitational Field strength on Earth?
9.8 N/kg
