Projectile Motion & Kinematics – Vocabulary Review

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Vocabulary flashcards covering key terms from the lecture on projectile motion, its components, and related kinematic concepts.

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19 Terms

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Projectile

An object that is given an initial velocity and then moves through the air under the influence of gravity alone.

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Trajectory

The path a moving object follows through space as a function of time; most commonly parabolic for projectiles.

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Projectile Motion

Two-dimensional motion exhibited by a projectile, combining horizontal and vertical movement.

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Velocity

A vector quantity indicating an object’s speed and direction (e.g., 51 kph North).

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Initial Velocity (vo or vi)

The velocity of an object at the instant motion begins.

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Final Velocity (vf)

The velocity of a moving body after it has reached its maximum acceleration.

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Vector Resultant (vr)

A single vector formed by combining the horizontal and vertical components of motion.

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Time of Flight (tf)

The total time a projectile remains in the air.

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Range (R)

The maximum horizontal distance a projectile travels during its motion.

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Maximum Height (ymax)

The greatest vertical displacement reached by a projectile.

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Two-Dimensional Motion

Motion that has both horizontal and vertical components.

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Mechanics

The branch of physics dealing with motion and forces; divided into kinematics and dynamics.

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Kinematics

The study of motion without considering the forces that cause it.

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Dynamics

The study of forces and their influence on the motion of objects.

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Horizontal Distance (dx)

The length a projectile travels horizontally; expressed only in units of length (e.g., meters).

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Vertical Distance (dy)

The length a projectile travels vertically; expressed only in units of length (e.g., meters).

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Horizontal Component (vx)

The constant horizontal velocity of a projectile; units of length per time (e.g., m/s).

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Vertical Component (vy)

The vertical velocity of a projectile, affected by gravity; units of length per time (e.g., m/s).

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Gravity

The constant acceleration acting downward on all objects near Earth’s surface, approximately 9.8 m/s².