Physics Unit Notes: Motion, Force, Work & Energy

Introduction to Physics Concepts

• This unit covers fundamental concepts in physics, including motion, forces, work, and energy.

• Key objectives include understanding definitions, identifying quantities as scalar or vector, interpreting graphs, and applying formulas for calculations.

Motion: Speed, Velocity, Displacement, Distance

• Speed

  • Defined as the rate of change of distance.

  • Is a Scalar quantity, meaning it only has magnitude (size).

  • Formula: $V = \frac{D}{T}$

• Velocity

  • Defined as the rate of change in the position of an object from a reference point.

  • Is a Vector quantity, meaning it includes both magnitude (size) and direction.

  • Example: $20\text{ m/s (East)}$

• Distance Traveled

  • A Scalar quantity (magnitude only).

• Displacement

  • A Vector quantity (magnitude and direction).

• Kinematic Variables

  • $V_i$ (or $u$) = initial velocity.

  • $V_f$ = final velocity.

  • $t$ = time.

  • $\Delta$ =