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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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Projectile
An object that is given an initial velocity and then moves through the air under the influence of gravity alone.
Trajectory
The path a moving object follows through space as a function of time; most commonly parabolic for projectiles.
Projectile Motion
Two-dimensional motion exhibited by a projectile, combining horizontal and vertical movement.
Velocity
A vector quantity indicating an object’s speed and direction (e.g., 51 kph North).
Initial Velocity (vo or vi)
The velocity of an object at the instant motion begins.
Final Velocity (vf)
The velocity of a moving body after it has reached its maximum acceleration.
Vector Resultant (vr)
A single vector formed by combining the horizontal and vertical components of motion.
Time of Flight (tf)
The total time a projectile remains in the air.
Range (R)
The maximum horizontal distance a projectile travels during its motion.
Maximum Height (ymax)
The greatest vertical displacement reached by a projectile.
Two-Dimensional Motion
Motion that has both horizontal and vertical components.
Mechanics
The branch of physics dealing with motion and forces; divided into kinematics and dynamics.
Kinematics
The study of motion without considering the forces that cause it.
Dynamics
The study of forces and their influence on the motion of objects.
Horizontal Distance (dx)
The length a projectile travels horizontally; expressed only in units of length (e.g., meters).
Vertical Distance (dy)
The length a projectile travels vertically; expressed only in units of length (e.g., meters).
Horizontal Component (vx)
The constant horizontal velocity of a projectile; units of length per time (e.g., m/s).
Vertical Component (vy)
The vertical velocity of a projectile, affected by gravity; units of length per time (e.g., m/s).
Gravity
The constant acceleration acting downward on all objects near Earth’s surface, approximately 9.8 m/s².