ASVAB Mechanical
Comprehension -Terms &
Definitions
1st Law of Motion - โ an object at rest tends to remain at
rest unless acted upon by an outside force
2nd Law of Motion - โ pushing/pulling an object produces
acceleration
3rd Law of Motion - โ for every action there is an equal and
opposite reaction
Force (F) - โ any effort that can push, pull, or rotate an
object to cause movement
Vector - โ a quantity having direction as well as magnitude
Scalar - โ a quantity having magnitude but no direction
Speed - โ rate of motion
Velocity - โ speed in a particular direction
Acceleration - โ change in velocity per unit of time
Momentum - โ product of an object's mass and velocity and
can be either linear or angular
Equilibrium - โ occurs when the forces acting upon an
object are balanced
Power - โ rate of doing work over time
Instantaneous Speed - โ speed of a moving object at a
particular instant along its motion
