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SCIENCE03L21: Effects of Force
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OBJECTIVES
❖ Explain how force can change the movement and direction of an object
❖ Tell that force is affected by the mass of an object
❖ Describe the movement of an object when force is applied to it
LESSON PREREQUISITES
Motion
LESSON PROPER
Force is a push or a pull. A push moves an object away from you. A pull moves an object closer to you. If you push on something or pull it, then you are applying force on it.
Forces are always acting on an object and even on you. You should know how to balance the forces, or else, you will also be in motion. You can say that an object has moved when it is no longer in its original position. You may assume that some kind of force pushed or pulled the object. This change in position is one of the common effects of force. If two forces act in the same direction on an object, the forces add together and the object experiences a greater force in that same direction.
What are some of the effects of force?
1. Force and Movement
Put a book on a table. Observe if it will move by itself. Unless you apply a force on the book, either by pushing or pulling, it will remain in its original position.
Get a ball and kick it. Observe how it will roll. The ball will continue rolling unless a force is applied to it to make it stop.
Both examples demonstrate the principle of inertia. Inertia states that an object will remain at rest unless a force is applied to make it move.
2. Fast and Slow Movements
Force can also speed up or slow down the movement of an object. Increasing the amount of force exerted on a moving object will make it move faster. On the other hand, decreasing the amount of exerted force will make the object move slower. The amount of force required to move an object depends on the weight of the object. Heavier objects
require greater force to move them. Lighter objects require less force. Objects can be made to move faster through the use of equipment like pulleys and wheels.
3. Stretching and Compressing Movements
A force can also make an object change its shape and size. There are objects with elastic properties. When you apply a pull force on them, they stretch or expand up to a particular point or distance, making it longer and bigger. Upon releasing them, they compress or go back to their starting point, making it shorter and smaller. Examples are rubber band, spring, slingshot, bow, and garter.
4. Up and Down Movements
As the child at one end pushes down, the child at the other end goes up. As the child who drops to the ground pushes up, the child at the other end goes down.
There are different ways to describe the movements of objects such as fast or slow, forward or backward, up or down, and stretching or compressing. Pulling things toward us will make them move backward. Pushing things away will make them move forward.
❖ Explain how force can change the movement and direction of an object
❖ Tell that force is affected by the mass of an object
❖ Describe the movement of an object when force is applied to it
LESSON PREREQUISITES
Motion
LESSON PROPER
Force is a push or a pull. A push moves an object away from you. A pull moves an object closer to you. If you push on something or pull it, then you are applying force on it.
Forces are always acting on an object and even on you. You should know how to balance the forces, or else, you will also be in motion. You can say that an object has moved when it is no longer in its original position. You may assume that some kind of force pushed or pulled the object. This change in position is one of the common effects of force. If two forces act in the same direction on an object, the forces add together and the object experiences a greater force in that same direction.
What are some of the effects of force?
1. Force and Movement
Put a book on a table. Observe if it will move by itself. Unless you apply a force on the book, either by pushing or pulling, it will remain in its original position.
Get a ball and kick it. Observe how it will roll. The ball will continue rolling unless a force is applied to it to make it stop.
Both examples demonstrate the principle of inertia. Inertia states that an object will remain at rest unless a force is applied to make it move.
2. Fast and Slow Movements
Force can also speed up or slow down the movement of an object. Increasing the amount of force exerted on a moving object will make it move faster. On the other hand, decreasing the amount of exerted force will make the object move slower. The amount of force required to move an object depends on the weight of the object. Heavier objects
require greater force to move them. Lighter objects require less force. Objects can be made to move faster through the use of equipment like pulleys and wheels.
3. Stretching and Compressing Movements
A force can also make an object change its shape and size. There are objects with elastic properties. When you apply a pull force on them, they stretch or expand up to a particular point or distance, making it longer and bigger. Upon releasing them, they compress or go back to their starting point, making it shorter and smaller. Examples are rubber band, spring, slingshot, bow, and garter.
4. Up and Down Movements
As the child at one end pushes down, the child at the other end goes up. As the child who drops to the ground pushes up, the child at the other end goes down.
There are different ways to describe the movements of objects such as fast or slow, forward or backward, up or down, and stretching or compressing. Pulling things toward us will make them move backward. Pushing things away will make them move forward.
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