Chapter 1- General Physics Definitions Flashcards
speed
distance an object moves in a time frame
acceleration
- rate of change in velocity per unit of time,
- vector as its direction is specified
terminal velocity
no net force is acting on the body
friction
force between two surfaces which impedes motion and results in heat
Newton’s First Law of Motion
if no external force is acting on it, an object will, if stationary, remain stationary, if moving, keep moving at a steady speed in the same straight line
Newton’s Second Law of Motion
F= m x a
Newton’s Third Law of Motion
if object A exerts a force on object B, then object B exerts an equal but opposite force on object A
Hooke’s Law
springs expand in proportion to load, as long as they are under their proportional limit
proportional limit
when load and extension are no longer proportional
centripetal vs centrifugal force
centripetal force-force acting towards the centre of the circle
centrifugal force- force acting against the centre of the circle
equal but opposite
moments
measure of a turning effect on a body
centre of mass
imaginary point in a body where mass acts on
scalars vs vectors
scalars- only magnitude
vectors-has direction as well as magnitude
principle of conservation of momentum
when bodies interact, total momentum remains constant, provided no external force acts on the system
energy
amount of work done
