IEB Matric Physics Definitions Exam/ Latest Update 2025
Law of conservation of linear momentum - CORRECT ANSWERS -The total linear momentum of an isolated system remains constant (is conserved).
Elastic collision - CORRECT ANSWERS -A collision in which both momentum and kinetic energy are con...
GRADE 12 PHYSICS DEFINITIONS
EXAM/ FULL COMPLETE 2025
NEWTONS SECOND LAW (MOMENTUM) - CORRECT ANSWERS -the net force
acting on an object is equal to the rate of change of momentum
LAW OF CONSERVATION OF LINEAR MOMENTUM - CORRECT ANSWERS -the
total linear momentum of an isolated system remains constant (is conserved)
ELASTIC COLLISION - CORRECT ANSWERS -a collision in which both momentum
and kinetic energy are conserved
INELASTIC COLLISION - CORRECT ANSWERS -a collision in which only momentum
is conserved
IMPULSE - CORRECT ANSWERS -the product of the net force and the contact time
WORK - CORRECT ANSWERS -work done on an object by a force is the product of
displacement and the component of the force parallel to the displacement
GRAVITATIONAL POTENTIAL ENERGY - CORRECT ANSWERS -the energy an
object possesses due to its position relative to a reference point
KINETIC ENERGY - CORRECT ANSWERS -the energy an object has as a result of the
object's motion
MECHANICAL ENERGY - CORRECT ANSWERS -the sum of the gravitational potential
and kinetic energy at a point
LAW OF CONSERVATION OF ENERGY - CORRECT ANSWERS -the total energy in a
system cannot be created nor destroyed; only transferred from one form to another
PRINCIPLE OF CONSERVATION OF MECHANICAL ENERGY - CORRECT
ANSWERS -in the absence of air resistance or any external forces, the mechanical
energy of an object is constant
WORK-ENERGY THEOREM - CORRECT ANSWERS -the work done by a net force on
an object is equal to the change in the kinetic energy of the object
POWER - CORRECT ANSWERS -the rate at which work is done/
the rate at which energy is transferred
WATT - CORRECT ANSWERS -one watt is defined as the power when one joule of
work is done in one second
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