Topic : Force
General Objectives :
At the end of this lesson students will be able to:
1.to know how a light object is easy to push than heavy object.
2.to know which thing pull back any object when we throw it up?
3.to understand how a light object can go faster than massive object.
Specific objectives:
At the end of this lesson students will be able to:
1.Define what is force.
2.Know effect of force
3.know types of force
4.know equation of force
5.Know unit of force
A.V aids :
Text book, black board, chalk, duster, charts, flash card
Teaching method:
Lecture cum-inductive / deductive method
Previous knowledge :
In order to check previous knowledge of students, teacher will ask questions such as,
1.when you roll a ball on ground why do it stop after traveling some distance.
2.When you play tug of war who wins and why?
Announcing the topic :
Dear students, Today we are going to learn about “force”
Presentation:
teacher Will define force: The push or pull on an object with mass that causes it to change its velocity. ∆ force is an external agent capable of changing the state of rest or motion of a particular body. Unit of force: The Force can be measured using a spring balance. The SI unit of force is Newton “N”. Equation of force: Equation for Force The quantity of force is expressed by the vector product of mass m and acceleration a. The equation or the formula for force can mathematically be expressed in the form of: F = ma Where, M = mass A = acceleration Effect of force .
The Force has different effects and here are some of them. Can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size. Types of force Force is a physical cause that can change the state of motion or the dimensions of an object. There are two types of forces based on their applications: Contact Force Non-Contact Force
Summative evaluation:
Tell me name of contact force Tell me name of non-contact force Homework: Write definition of force Write unit of force Write effect of force
