ASTB Mechanical Comprehension
UPDATED Exam Questions and CORRECT
Answers
scalar values - CORRECT ANSWER - Have a magnitude but no direction aka mass
Vector - CORRECT ANSWER - Magnitude and direction
Velocity - CORRECT ANSWER - Speed and direction
Force - CORRECT ANSWER - A push or pull (vector)
What is force measured in? - CORRECT ANSWER - Newtons (N) or pounds of force (lbf)
The foundation of mechanics that describes the basic rules of force. - CORRECT ANSWER -
Newton's Laws of Motion
Newtons first law of motion - CORRECT ANSWER - The law of Inertia- An object at rest
will remain at rest and an object in motion will remain in motion until a force is applied.
Inertia - CORRECT ANSWER - An objects natural resistance to a change in its motion
Newtons second law of motion - CORRECT ANSWER - Force = Mass times acceleration
Acceleration - CORRECT ANSWER - The rate of change of an objects velocity
Velocity/time
, Newtons third law of motion - CORRECT ANSWER - For every action there is an equal and
opposite reaction
Static - CORRECT ANSWER - no motion is involved
Centrifugal Force - CORRECT ANSWER - The reaction force of a centripetal force that pulls
an object towards the outside of the curved path
Centripetal Force - CORRECT ANSWER - force that makes an object travel along a curved
path
Law of universal gravitation - CORRECT ANSWER - gravity is proportionate to two objects
masses and inversely proportionate to the square of the distance between them
universal gravitation equation - CORRECT ANSWER - Fg = mass of an object times the
acceleration of gravity (9.81m/s squared)
Weight - CORRECT ANSWER - The measure of force of gravity on an object (newtons or
pounds) mass times gravity
normal force - CORRECT ANSWER - force against weight that keeps things from falling to
the ground example is a book on a table where the table exerts the normal force
Torque equation - CORRECT ANSWER - distance of the force from the fulcrum or pivot
point times the tangential force
T=F*r measured in (newton-meters
Stiction - CORRECT ANSWER - The force necessary to start sliding and object
UPDATED Exam Questions and CORRECT
Answers
scalar values - CORRECT ANSWER - Have a magnitude but no direction aka mass
Vector - CORRECT ANSWER - Magnitude and direction
Velocity - CORRECT ANSWER - Speed and direction
Force - CORRECT ANSWER - A push or pull (vector)
What is force measured in? - CORRECT ANSWER - Newtons (N) or pounds of force (lbf)
The foundation of mechanics that describes the basic rules of force. - CORRECT ANSWER -
Newton's Laws of Motion
Newtons first law of motion - CORRECT ANSWER - The law of Inertia- An object at rest
will remain at rest and an object in motion will remain in motion until a force is applied.
Inertia - CORRECT ANSWER - An objects natural resistance to a change in its motion
Newtons second law of motion - CORRECT ANSWER - Force = Mass times acceleration
Acceleration - CORRECT ANSWER - The rate of change of an objects velocity
Velocity/time
, Newtons third law of motion - CORRECT ANSWER - For every action there is an equal and
opposite reaction
Static - CORRECT ANSWER - no motion is involved
Centrifugal Force - CORRECT ANSWER - The reaction force of a centripetal force that pulls
an object towards the outside of the curved path
Centripetal Force - CORRECT ANSWER - force that makes an object travel along a curved
path
Law of universal gravitation - CORRECT ANSWER - gravity is proportionate to two objects
masses and inversely proportionate to the square of the distance between them
universal gravitation equation - CORRECT ANSWER - Fg = mass of an object times the
acceleration of gravity (9.81m/s squared)
Weight - CORRECT ANSWER - The measure of force of gravity on an object (newtons or
pounds) mass times gravity
normal force - CORRECT ANSWER - force against weight that keeps things from falling to
the ground example is a book on a table where the table exerts the normal force
Torque equation - CORRECT ANSWER - distance of the force from the fulcrum or pivot
point times the tangential force
T=F*r measured in (newton-meters
Stiction - CORRECT ANSWER - The force necessary to start sliding and object
