AP Physics 1- Unit 2 Questions and All
Correct Answers 2026.
Newton's 1st Law - Answer An object at rest stays at rest and an object in motion stays in
constant motion (with the same speed and in the same direction) unless acted upon by an
unbalanced/external force.
Newton's 2nd Law - Answer Acceleration is produced when a force acts on a mass. The
greater the mass (of the object being accelerated) the greater the amount of force needed (to
accelerate the object).
Newton's 3rd Law - Answer For every action, there is an equal and opposite reaction.
Relationship of Net force= Mass x Acceleration - Answer Net Force and acceleration are in
the numerator, so they must be directly proportional and since mass is a scalar quantity (can't
be negative) while net force and acceleration are scalar quantities, direction of acceleration
dictates the direction of the net force.
Weight/Force due to gravity - Answer Results from the interaction of 2 objects with mass
and is always down. Fg= mass x gravity. The unit for weight is Newton (N).
Normal Force - Answer Results from the interaction of an object with a surface. It is always
perpendicular to the surface.
Tension - Answer Results from the presence of a string/rope/cable. Same at each ends of
one continuous rope. It is always in the direction the string is pulling on the object.
Static Friction - Answer Results from the microscopic imperfections in two surfaces when an
object is not moving. It always opposes the potential direction of motion.
Kinetic Friction - Answer Results from the microscopic imperfections in two surfaces when
an object is moving. It always opposes the potential direction of motion.
Applied Force - Answer Results from a person or a thing. It is always in the direction of the
push or pull.
Correct Answers 2026.
Newton's 1st Law - Answer An object at rest stays at rest and an object in motion stays in
constant motion (with the same speed and in the same direction) unless acted upon by an
unbalanced/external force.
Newton's 2nd Law - Answer Acceleration is produced when a force acts on a mass. The
greater the mass (of the object being accelerated) the greater the amount of force needed (to
accelerate the object).
Newton's 3rd Law - Answer For every action, there is an equal and opposite reaction.
Relationship of Net force= Mass x Acceleration - Answer Net Force and acceleration are in
the numerator, so they must be directly proportional and since mass is a scalar quantity (can't
be negative) while net force and acceleration are scalar quantities, direction of acceleration
dictates the direction of the net force.
Weight/Force due to gravity - Answer Results from the interaction of 2 objects with mass
and is always down. Fg= mass x gravity. The unit for weight is Newton (N).
Normal Force - Answer Results from the interaction of an object with a surface. It is always
perpendicular to the surface.
Tension - Answer Results from the presence of a string/rope/cable. Same at each ends of
one continuous rope. It is always in the direction the string is pulling on the object.
Static Friction - Answer Results from the microscopic imperfections in two surfaces when an
object is not moving. It always opposes the potential direction of motion.
Kinetic Friction - Answer Results from the microscopic imperfections in two surfaces when
an object is moving. It always opposes the potential direction of motion.
Applied Force - Answer Results from a person or a thing. It is always in the direction of the
push or pull.
