Forces and Their Effec - JSS1 Basic technology Lesson Note
Definition of Force:
A force is any interaction that, when unopposed, changes the motion of an object. It can cause an object to start moving, stop moving, change direction, or alter its shape. Measured in Newtons (N).
Types of Forces:
- Contact Forces:* Forces that occur when objects are physically touching. Examples: friction, tension, normal force.
- Non-Contact Forces:** Forces that act over a distance without physical contact. Examples: gravitational force, magnetic force, electrostatic force.
Effects of Forces:
- Change in Motion: Forces can accelerate or decelerate an object, changing its speed and direction.
- Change in Shape: Forces can deform objects, stretching, compressing, or bending them.
- Balanced and Unbalanced Forces:** When forces on an object are balanced, the object remains in its current state of motion. When forces are unbalanced, the object’s motion changes.
Newton's Laws of Motion:
- First Law (Inertia): An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
- Second Law (F=ma): The acceleration of an object depends on the mass of the object and the amount of force applied.
- Third Law (Action-Reaction): For every action, there is an equal and opposite reaction.