Dynamics Flashcards
Newton’s Third Law of Motion
when body A exerts a force on body B, body B exerts on body A a force of the same type, equal in magnitude and opposite in direction.
Newton’s First Law of Motion
An object stays at rest or continues to move at constant velocity unless a resultant force acts on it.
Weight of a body
the force acting on the body due to a gravitational field
linear momentum
the product of its mass and its velocity
p=mv
Newton’s Second Law of Motion
the rate of change of momentum of a body is directly proportional to the resultant force acting on it and takes place in the direction of the resultant force
Impulse
Product of force and time duration of impact
The Principle of Conservation of Linear Momentum
The total linear momentum of an isolated system of interacting bodies before and after collision remains constant if no net external force acts on the system
Elastic Collision
total kinetic energy of system of bodies before and after collision remains the same
inelastic collision
total kinetic energy of system of bodies after collision is less than before
perfectly inelastic collision
masses stick together after collision
Mass
Property of a body which resists change in motion
Weightlessness
The state where a body experiences no contact forces
resultant force
the rate of change of momentum
