Vocab Semester 1 Flashcards
(19 cards)
7 fundamental units
kilogram, second, mole,
meter, ampere, Kelvin, candela
What is Displacement?
Distance traveled from a fixed point in a particular direction.
What is Velocity?
Rate of change of displacement.
What is Speed?
Rate of change of distance.
What is Acceleration?
Rate of change of velocity.
What is Newton’s First Law of Motion?
An object at rest remains at rest and an object in motion remains in motion at a constant speed in a straight line unless acted on by an unbalanced force.
What is Newton’s Second Law of Motion?
An unbalanced force will cause an object to accelerate in the direction of the net force. The acceleration of the object is proportional to the net force and inversely proportional to its mass. (Fnet = ma or Fnet = Δ p/Δ t)
What is Newton’s Third Law of Motion?
When two bodies A and B interact (push or pull), the force that A exerts on B is equal and opposite to the force that B exerts on A.
What is Equilibrium?
Net force acting on a body is zero.
What is Linear Momentum?
Product of mass and velocity. kg-m/s
What is Impulse?
Change in momentum. N-s or kg-m/s
What is the Law of Conservation of Linear Momentum?
The total momentum of an isolated system (no external forces) remains constant.
What is Work (W)?
The product of a force on an object and the displacement of the object in the direction of the force. N-m or Joule (J)
What is the Principle of Conservation of Energy?
The total energy of an isolated system (no external forces) remains constant.
What is an Elastic Collision?
A collision in which kinetic energy is conserved.
What is an Inelastic Collision?
A collision in which kinetic energy is not conserved.
What is Power (P)?
The rate at which work is done or the rate at which energy is transferred. J/s or Watt (W)
What is Efficiency?
The ratio of the useful energy (or power or work) output to the total energy (or power or work) input.
What is Newton’s Universal Law of Gravitation?
Every object attracts every other object with a force that is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them and acts along a line joining their centers.
