ASTB Mechanical comprehension
Exam Questions and Answers 100%
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scalar values - ✔✔Have a magnitude but no direction aka mass
Vector - ✔✔Magnitude and direction
Velocity - ✔✔Speed and direction
Force - ✔✔A push or pull (vector)
What is force measured in? - ✔✔Newtons (N) or pounds of force (lbf)
The foundation of mechanics that describes the basic rules of force. - ✔✔Newton's Laws
of Motion
Newtons first law of motion - ✔✔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 - ✔✔An objects natural resistance to a change in its motion
Newtons second law of motion - ✔✔Force = Mass times acceleration
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, Acceleration - ✔✔The rate of change of an objects velocity
Velocity/time
Newtons third law of motion - ✔✔For every action there is an equal and opposite
reaction
Static - ✔✔no motion is involved
Centrifugal Force - ✔✔The reaction force of a centripetal force that pulls an object
towards the outside of the curved path
Centripetal Force - ✔✔force that makes an object travel along a curved path
Law of universal gravitation - ✔✔gravity is proportionate to two objects masses and
inversely proportionate to the square of the distance between them
universal gravitation equation - ✔✔Fg = mass of an object times the acceleration of
gravity (9.81m/s squared)
Weight - ✔✔The measure of force of gravity on an object (newtons or pounds) mass
times gravity
normal force - ✔✔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
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Exam Questions and Answers 100%
Pass
scalar values - ✔✔Have a magnitude but no direction aka mass
Vector - ✔✔Magnitude and direction
Velocity - ✔✔Speed and direction
Force - ✔✔A push or pull (vector)
What is force measured in? - ✔✔Newtons (N) or pounds of force (lbf)
The foundation of mechanics that describes the basic rules of force. - ✔✔Newton's Laws
of Motion
Newtons first law of motion - ✔✔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 - ✔✔An objects natural resistance to a change in its motion
Newtons second law of motion - ✔✔Force = Mass times acceleration
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, Acceleration - ✔✔The rate of change of an objects velocity
Velocity/time
Newtons third law of motion - ✔✔For every action there is an equal and opposite
reaction
Static - ✔✔no motion is involved
Centrifugal Force - ✔✔The reaction force of a centripetal force that pulls an object
towards the outside of the curved path
Centripetal Force - ✔✔force that makes an object travel along a curved path
Law of universal gravitation - ✔✔gravity is proportionate to two objects masses and
inversely proportionate to the square of the distance between them
universal gravitation equation - ✔✔Fg = mass of an object times the acceleration of
gravity (9.81m/s squared)
Weight - ✔✔The measure of force of gravity on an object (newtons or pounds) mass
times gravity
normal force - ✔✔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
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