Physical Science P1 Grade 12 Definitions Practice
Questions & Answers Rated A+
Normal Force - Answer the force or the component of a force which a surface exerts on an object with
which it is in contact, and which is perpendicular to the surface
Frictional Force - Answer the force that opposes the motion of an object and which acts parallel to the
surface
Static Frictional Force fs, - Answer the force that opposes the tendency of motion of a stationary object
relative to a surface
Kinetic Frictional Force fk, - Answer as the force that opposes the motion of a moving object relative to a
surface
Newton's First Law - Answer A body will remain in its state of rest or motion at constant velocity unless a
non-zero resultant / net force acts on it
Newton's Second Law - Answer When a resultant/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
Newton's Third Law - Answer When one body exerts a force on a second body, the second body exerts a
force of equal magnitude in the opposite direction on the first body
Newton's Law of Universal Gravitation - Answer Newton's Law of Universal Gravitation: Each body in the
universe attracts every other body with a force that is directly proportional to the product of their
masses and inversely proportional to the square of the distance between their centres
Weight - Answer the gravitational force the Earth exerts on any object on or near its surface
Momentum - Answer the product of an object's mass and its velocity
Questions & Answers Rated A+
Normal Force - Answer the force or the component of a force which a surface exerts on an object with
which it is in contact, and which is perpendicular to the surface
Frictional Force - Answer the force that opposes the motion of an object and which acts parallel to the
surface
Static Frictional Force fs, - Answer the force that opposes the tendency of motion of a stationary object
relative to a surface
Kinetic Frictional Force fk, - Answer as the force that opposes the motion of a moving object relative to a
surface
Newton's First Law - Answer A body will remain in its state of rest or motion at constant velocity unless a
non-zero resultant / net force acts on it
Newton's Second Law - Answer When a resultant/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
Newton's Third Law - Answer When one body exerts a force on a second body, the second body exerts a
force of equal magnitude in the opposite direction on the first body
Newton's Law of Universal Gravitation - Answer Newton's Law of Universal Gravitation: Each body in the
universe attracts every other body with a force that is directly proportional to the product of their
masses and inversely proportional to the square of the distance between their centres
Weight - Answer the gravitational force the Earth exerts on any object on or near its surface
Momentum - Answer the product of an object's mass and its velocity
