Dynamics - Definitions Flashcards
Newton’s first law
A body will remain at rest or moving at a constant speed unless acted upon by an external force
Newton’s second law
The acceleration of an object is directly proportional to force and inversely proportional to the mass of the object
Newton’s third law
Every action has an equal and opposite reaction
Mass
The amount of substance or matter
Inertia
The property of matter that causes it to resist any change to its motion in either direction or speed
Weight
This is mass times gravity
Work
The amount of force required to cause movement
Power
The rate at which work is done
Force
What changes a body’s state of rest or of uniform motion in a straight line
Energy
The capacity to do work
Potential energy
Energy a body has by virtue of its position or condition, allowing it to do work when released
Kinetic energy
Energy a body has due its motion
Total energy
The sum of all different forms of energy in a system
Chemical energy
Energy which is stored in the chemical bonds between atoms
Thermal energy
The energy which a body possesses due to the kinetic energy and the potential energy of its molecules, also called internal energy
