Newton's Laws Flashcards
Normal force:
The force or the component of force which a surface exerts on an object with which it is in contact and which is perpendicular to the surface.
Frictional force:
The force that opposes the motion of an object and which acts parallel to the surface.
Static frictional force:
The force that opposes the tendency of motion of a stationary object relative to the surface.
Kinetic frictional force:
The force that opposes the motion of a moving object relative to a surface.
What is Newton’s First Law?
A body will remain at rest or at constant velocity unless a non-zero resultant force acts on it.
Define Newton’s Second Law.
When a net force acts on an object, the object will accelerate in the direction of the force at an acceleration directly proportional to the force and inversely proportional to the mass of the object.
What is Newton’s Third Law?
When one body exerts a force on a second body, the second body will exert a force equal in magnitude and opposite in direction of the first body.
What is Newton’s Law of Universal Gravitation?
Each body in the universe attracts every body with a force that is directly proportional to the product of their masses and inversely proportional to the square distance between their centres.
Weight:
The gravitational force that the earth exert on any object near or on its surface.
Define work.
The constant force F, where F is the magnitude of the force and delta x the magnitude of the displacement and theta the angle between the force and displacement.
What is the work energy theorem?
The total work done on an object is equal to the change in the object’s kinetic energy.
Conservative Force:
A force for which the work done in moving an object between two points is independent of the path taken. Eg. Gravity
State the principle of conservation of mechanical energy:
The total mechanical energy in an isolated system remains constant.
Define power.
The rage at which work is done.
