IB Physics 2026 | Study
Guide, Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Displacement The distance in a given direction from a fixed origin.
Velocity The rate of change of the displacement in respect to time.
Acceleration The rate of change of velocity with respect to time.
Newton's First Law When the net force on a system is zero, the system remains at rest or moves with
constant velocity.
Newton's Second Law The (average) net force on a body equals the rate of change of the body's
momentum, Fnet=Δp/Δt. When the mass is constant, this reduces to Fnet=ma.
Newton's Third Law If a body A exerts a force on body B, then body B will exert an equal and opposite
force on body A.
Equilibrium When the net force acting on a body is zero.
Inertial Mass Net force on a body divided by the acceleration of the body.
Centrifugal Force There is no such thing. Students erroneously include such a force to point away
from the center of a circular path. But the body is not in equilibrium and so no such
force is needed.
Centripetal Acceleration The acceleration that limits a linear motion to a circular motion; It points towards the
center of the circular path.
Gravitational Potential The work done per unit mass in bringing a small point mass from infinity to a point in
gravitational field. For a spherical or point mass. V= -GM/r
Hooke's Law The tension in a spring is proportional to its extension, F=Kx where K is a spring's
Spring constant.
Guide, Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Displacement The distance in a given direction from a fixed origin.
Velocity The rate of change of the displacement in respect to time.
Acceleration The rate of change of velocity with respect to time.
Newton's First Law When the net force on a system is zero, the system remains at rest or moves with
constant velocity.
Newton's Second Law The (average) net force on a body equals the rate of change of the body's
momentum, Fnet=Δp/Δt. When the mass is constant, this reduces to Fnet=ma.
Newton's Third Law If a body A exerts a force on body B, then body B will exert an equal and opposite
force on body A.
Equilibrium When the net force acting on a body is zero.
Inertial Mass Net force on a body divided by the acceleration of the body.
Centrifugal Force There is no such thing. Students erroneously include such a force to point away
from the center of a circular path. But the body is not in equilibrium and so no such
force is needed.
Centripetal Acceleration The acceleration that limits a linear motion to a circular motion; It points towards the
center of the circular path.
Gravitational Potential The work done per unit mass in bringing a small point mass from infinity to a point in
gravitational field. For a spherical or point mass. V= -GM/r
Hooke's Law The tension in a spring is proportional to its extension, F=Kx where K is a spring's
Spring constant.
