Physical Science-Chapter 11

Displacement

a vector quantity that describes a change in position.

Distance

how far an object moves during a time interval.

Scalar

a measurable quantity that consists of magnitude (size) only.

Kinematics

the study of how things move.

Dynamics

the branch of physics that studies forces and how they can change an objects motion.

Vector

a measurable quantity with both magnitude and direction.

Acceleration

the rate of change in velocity.

Trajectory

the curved path of a projectile.

Velocity

a vector quantity indicating the rate at which an objects position changes.

Free fall

the motion of an object that falls due to gravity alone, with no other forces acting on it.

Momentum

a property of a moving system that is equal to its velocity times its mass.

Quantum mechanics

the branch of physics that explores the behavior of matter and energy at the atomic and subatomic level.

Frame of reference

a coordinate system used to describe the motion of an object.

Relativistic mechanics

the study of the motion of objects whose speeds are near the speed of light.

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.

mechanics

the study of motion

kinematics

the study of how things move

dynamics

the branch of physics that studies forces and how they can change an objects motion

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

quantum mechanics

the branch of physics that explores the behavior of matter and energy at the atomic and subatomic level

relativistic mechanics

the study of the motion of objects whose speeds are near the speed of light

frame of reference

aa coordinate system used to describe the motion of an object

distance

how far an object moves during a time interval

displacement

a vector quantity that describes a change in position

scalar

a measurable quantity that consists of magnitude (size) only

vector

a measurable quantity with both magnitude and direction

speed

a scalar quantity indicating the rate at which an object moves

velocity

a vector quantity indicating the rate at which an objects position changes

momentum

a property of a moving system that is equal to its velocity times its mass

pushes or pulls

the total momentum remains constant

acceleration

the rate of change in velocity

free fall

the motion of an object that falls due to gravity alone, with no other forces acting on it

circular motion

movement along a circular path

centripetal acceleration

acceleration that causes an object to move along along a circular path

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

trajectory

the curved path of a projectile

mechanics

the study of motion

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

speed

a scalar quantity indicating the rate at which an object moves

conservation of momentum

states that within a closed system - a system that is isolated from outside. pushes or pulls - the total momentum remains constant

circular motion

movement along a circular path

centripetal acceleration

acceleration that causes an object to move along along a circular path