What is Force?, Classifying Forces, The "Base-Forces"
What is Force? Definition: Force is the effect that changes (or tries to change) the motion state of an object or the object's shape . Vector Quantity: Just like velocity and acceleration, Force is a vector quantity (it has both magnitude and direction). Effects: The behavior of an object depends on the resultant forces . For example, when you kick a football, you control its speed and direction. Mechanical Types: Forces can manifest in various ways , including: Push and Pull Tensile force and Compression force Rotation force and Torsion force Unit of Measurement: The international unit for Force is the Newton (N) . 1 N = 1kg.m/s 2 2. Classifying Forces We can categorize forces into two main groups based on how they interact: A. Contact Forces: These occur when two objects have direct contact . Measurement: We can measure force using a spring scale . B. Base-Forces (Forces in Nature): These fo...