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Kinematics

The study of motion and how to describe it.

Distance

- Total length of travel

- Scalar Quantity (Magnitude)

Displacement

- Change in position with respect to the initial position

- Vector Quantity (Magnitude/Direction)

- Shortest distance between 2 points

Speed

- Scalar Quantity (Magnitude)

- Always positive

- Rate of Motion

• Formula: Speed=Distance\Time

Displacement

- Vector Quantity (Magnitude, Direction)

- Displacement per unit of time

- May be positive or negative depending on the direction

Formula: Velocity=Displacement\Time

Acceleration

• The rate at which velocity changes over time.

• Vector quantity (magnitude, direction)

• Characteristics:

  • Can result in:

    • Change in speed

    • Change in direction

    • Or both

  • Positive acceleration: Speeding up

  • Negative acceleration (deceleration): Slowing dow

Projectile

Any object that continues in motion due to its own inertia and is influenced only by the downward force of gravity (and air resistance).

• Moves under the influence of gravity after being projected

• Air resistance may affect its motion, but often ignored in basic physics

Trajectory

The path that a projectile follows as it moves through the air.