مفاهيم الفيزياء

Physics Concepts

• Scientific Methods: The series of steps scientists use to investigate and solve problems.
• Hypothesis: A proposed explanation for an observation or phenomenon, which can be tested.
• Scientific Law: A description of the relationship between physical quantities.
• Theory: A well-substantiated explanation of some aspect of the natural world.

Vectors

• Vector Addition (East/West): Two vectors, one pointing East (8 m) and the other West (5 m), their sum is (3 m) East.

Newton's First Law of Motion

• Inertia: The tendency of an object to resist changes in its motion.

SI Units

• Temperature: The SI unit of temperature is Kelvin.

Particle Model

• Motion Diagrams: Particle model diagrams illustrate the movement of objects over time. A series of points displays the changing positions.

Free Fall

• Calculating Height: The height of a falling object given time can be calculated using equations of motion where air resistance is negligible.

Precision and Accuracy

• Measurements: Measurements can be both precise and accurate ; precise measurements are consistent but not necessarily correct, while accurate measurements are close to the true value. The example image shows measurements are accurate and precise.

Acceleration

• Direction: An object changing speed and moving along a straight line has acceleration in the same direction as the change of velocity vector(s).

Force & Acceleration

• Calculating Acceleration: The acceleration of an object under force(s) can be found by calculating the net force divided by its mass.

Average Velocity

• Calculating Velocity: Average velocity is calculated by dividing the total displacement (change in position) by the total time taken. The correct calculations provide a vector value and the direction.