Physical Science-Chapter 11 

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Physical Science

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42 Terms

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Displacement
a vector quantity that describes a change in position.
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Distance
how far an object moves during a time interval.
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Scalar
a measurable quantity that consists of magnitude (size) only.
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Kinematics
the study of how things move.
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Dynamics
the branch of physics that studies forces and how they can change an objects motion.
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Vector
a measurable quantity with both magnitude and direction.
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Acceleration
the rate of change in velocity.
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Trajectory
the curved path of a projectile.
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Velocity
a vector quantity indicating the rate at which an objects position changes.
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Free fall
the motion of an object that falls due to gravity alone, with no other forces acting on it.
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Momentum
a property of a moving system that is equal to its velocity times its mass.
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Quantum mechanics
the branch of physics that explores the behavior of matter and energy at the atomic and subatomic level.
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Frame of reference
a coordinate system used to describe the motion of an object.
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Relativistic mechanics
the study of the motion of objects whose speeds are near the speed of light.
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Projectile motion
the two- dimensional motion of any flying object whose path is determined by the influence of an external force only, such as gravity.
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mechanics
the study of motion
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kinematics
the study of how things move
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dynamics
the branch of physics that studies forces and how they can change an objects motion
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retrograde motion
the apparent motion of some planets in which they appear to slow down, stop, reverse their direction, and then resume their normal motion
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quantum mechanics
the branch of physics that explores the behavior of matter and energy at the atomic and subatomic level
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relativistic mechanics
the study of the motion of objects whose speeds are near the speed of light
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frame of reference
aa coordinate system used to describe the motion of an object
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distance
how far an object moves during a time interval
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displacement
a vector quantity that describes a change in position
25
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scalar
a measurable quantity that consists of magnitude (size) only
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vector
a measurable quantity with both magnitude and direction
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speed
a scalar quantity indicating the rate at which an object moves
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velocity
a vector quantity indicating the rate at which an objects position changes
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momentum
a property of a moving system that is equal to its velocity times its mass
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pushes or pulls
the total momentum remains constant
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acceleration
the rate of change in velocity
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free fall
the motion of an object that falls due to gravity alone, with no other forces acting on it
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circular motion
movement along a circular path
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centripetal acceleration
acceleration that causes an object to move along along a circular path
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projectile motion
the two-dimensional motion of any flying object whose path is determined by the influence of an external force only, such as gravity
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trajectory
the curved path of a projectile
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mechanics
the study of motion
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retrograde motion
the apparent motion of some planets in which they appear to slow down, stop, reverse their direction, and then resume their normal motion
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speed
a scalar quantity indicating the rate at which an object moves
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conservation of momentum
states that within a closed system - a system that is isolated from outside. pushes or pulls - the total momentum remains constant
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circular motion
movement along a circular path
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centripetal acceleration
acceleration that causes an object to move along along a circular path