Resultant
The vector sum of 2 or more vectors
Normal force
The component of a force which a surface exerts on an object in contact with it, and which is perpendicular to the surface
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Resultant
The vector sum of 2 or more vectors
Normal force
The component of a force which a surface exerts on an object in contact with it, 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 the surface
Newton’s first law of motion
A body will remain in its state of rest or motion at constant velocity unless a non-zero resultant force acts on it
Inertia
The resistance of an object to any change in its state of motion (mass)
Newton’s second law of motion
When a resultant 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
Newton’s third law of motion
When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A
Newton’s law of universal gravitation
Each particle in the universe attracts every other particle with a gravitational force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres
Weightlessness
The sensation experienced when al contact forces are removed
Coulomb’s law
The electrostatic force between 2 charged particles is directly proportional to the product of the changes on the particles, and inversely proportional to the square of the distance between the point charges
Electric field
A region/space in which a charged object will experience an electrostatic force
Direction of the electric field
The direction of the electric field line at a point is the direction in which a positive point charge would accelerate, or move when placed at that point
Electric field (E)
Electric field at a point is the electrostatic force per positive unit charge at that point in the electric field
Equilibrant
Single force that keeps the other forces that act on an object in the equilibrium
Law of Conservation of Charge
Charge cannot be created or destroyed but only transferred. Sum of charges remains constant in an isolated system