1. Force
1.1. Definition
1.1.1. A force is a push or pull exerted on an object that can cause it to change its velocity (to accelerate), direction, or shape.
1.2. Unit
1.2.1. Measured in Newtons (N), where 1 Newton is the force required to accelerate 1 kilogram of mass by 1 meter per second squared (1 N = 1 kg.m/s²).
1.3. Formula
1.3.1. P x A where P is referred to as pressure and A is referred to as area over which force is applied.
1.4. Example
1.4.1. •Pushing a Cart: Applying force to move a shopping cart. • Pulling a Rope: Exerting force to pull a rope in tug-of-war.
2. Pressure
2.1. Definition
2.1.1. Pressure is the force applied per unit area on the surface of an object.
2.2. Unit
2.2.1. Measured in Pascals (Pa), where 1 Pascal is equal to 1 Newton per square meter (1 Pa = 1 N/m²).
2.3. Formula
2.3.1. P=F/A. • Where F is pressure, F is force, and A is the area over which the force is applied.
2.4. Example
2.4.1. •Standing on the Ground: The pressure exerted by feet on the ground. • Inflating a Balloon: Air pressure inside a balloon causes it to expand.