Force
The state where no physical changes occur
What is mechanical equilibrium?
The property of any body to resist changes in it's state of motion
What is inertia?
Speed in a given direction
What is velocity?
For every action there is an equal and opposite reaction
What is Newton's third law?
The product of the mass of an object and it's velocity
What is momentum?
The sum forces acting on an object
What is net force?
The SI (standard international) unit of force
The acceleration due to gravity
What is 9.81m/s2
Σ F = ma
What is Newton's second law?
A collision that doesn't generate heat or deform the objects
What is an elastic collision?
A quantity that needs both magnitude and direction
What is a vector quantity?
The measurement of inertia
What is mass?
An object only affected by Earth's gravity
What is an object in free fall?
The force opposite an action force
What is a reaction force?
A collision in which colliding objects become distorted and generate heat
What is an inelastic collision?
The force between a table and a block placed on it
What is a normal force?
The SI (standard international) unit of mass
What is a kilogram?
The distance between a start and end position
What is displacement?
The speed at which the acceleration of a falling object is zero
What is terminal speed?
Product of force and time interval during which the force acts
What is impulse?
A force involving rope or string
What is tension?
The force of gravity on an object
What is weight?
The slope of a speed vs time graph
What is acceleration?
The force of friction between air molecules and an object moving through the air
What is air resistance?
The law that states in the absence of an external force, the momentum of a system remains unchanged
What is the law of conservation of momentum?