問題一覧
1
An object is in motion if its position changes in relation to some stationary objects
Motion
2
Is a branch of physics that deals with emotion of objects and the forces that change
Mechanics
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Refers to the branch of physics that deals with motion of objects and the forces acting on them
Classical mechanics
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Is a specific subset of classical mechanics that is based on Isaac Newton law
Newtonian mechanic
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Describes the quantitative description of motion
kinematics
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Deals with forces and their effect on motion
Dynamics
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Deals with the study of forces acting on bodies at rest
Statics
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Displacement of an object
Motion
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It is the motion of a body along a straight line
Rectilinear Motion
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Is the motion along a circular path?
Curvilinear motion
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Is described as any object moving swinging back-and-forth, moving up and down
Vibrational motion
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Is the length of the actual path traveled
Distance
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Is the length and direction of the change in position?
Displacement
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Is a measure of how fast it moves
Speed
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Is the speed of one object as observed from another moving object
Relative speed
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The speed in a given direction
Velocity
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An object, speed and direction are both unchanging
Constant velocity
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The speed of an object specific moment in time
Instantaneous velocity
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When an object falls forward to the ground
Freefall
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Is a vector quantity that measures the rate at which an objects velocity changes
Acceleration
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Acceleration that keeps an object moving in a circular path
Centripetal acceleration
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Is there any object which has any initial velocity and Then follows above, determined entirely by the effect of air resistance and gravitational force
Projectile
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Is any motion of an object projected by some means into the air at an angle?
Projectile motion
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Is the path of a projector that is determined by vertical and horizontal motions
Trajectory
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Is a reliably known digit
Significant figures