Physics Kenya
Force
Force
A force is an interaction that causes a change. In mechanics, a force is an interaction that causes a change in velocity (an interaction that causes acceleration).
For better understanding of this concept, let’s ask ourselves the following question:
- What causes/makes a body at rest to move?
- What causes the same body in motion to stop?
Force
The answers to these questions, is of course that a force is required to do so. Here, an applied force to a body can cause the body at rest to move or if already moving a body application of force can do the following when applied to a body.
- Force can cause a change in the way the object moves
- Change its size or shape
- Change the direction in which an object is moving
A force is defined as a push or pull experienced by an object. The force is usually described in terms of its size (magnitude) and direction.
Definition of force
Types of forces(including cohesive,adhesive and surface tension)
A force acting on an object may cause the object to change shape, to start moving, to stop moving, to accelerate or decelerate.
When two objects interact with each other they exert a force on each other, the forces are equal in size but opposite in direction.
Resultant force
The forces acting on an object can be replaced with a single force that causes the object to behave in the same way as all the separate forces acting together did, this one overall force is called the resultant force.
Experiments to demonstrate cohesion,adhesive and surface tension
Effects of force
Mass, weight and their relationship
Scalar and vector quantities
Problem involving W =mg (take g = 10 N/kg)
Listening to this topic
