Free body diagrams (FBDs) are important tools in Year 9 physics. They help us understand Newton’s Laws of Motion.
When you create a free body diagram, you draw the object as a dot and use arrows to show the forces acting on it. Here’s how it works:
Weight (Gravity): This force pulls the object down. You draw an arrow pointing down to show this.
Normal Force: If the object is sitting on a surface, there’s a support force pushing it up. This is shown with an arrow pointing up.
Friction: When there's resistance, like when you push a box, you show this force with an arrow pointing in the opposite direction of where the object is moving.
First Law (Inertia): FBDs show that if the total force on an object is zero, it will either stay still or keep moving at a constant speed.
Second Law (F=ma): By adding up all the forces in an FBD, you can find the net force. This helps you figure out the object’s acceleration using the formula .
Third Law (Action-Reaction): For every force in a free body diagram, there's another force that is equal and opposite.
In short, free body diagrams make it easier to understand forces. They help us use Newton’s Laws and predict how an object will move.
Free body diagrams (FBDs) are important tools in Year 9 physics. They help us understand Newton’s Laws of Motion.
When you create a free body diagram, you draw the object as a dot and use arrows to show the forces acting on it. Here’s how it works:
Weight (Gravity): This force pulls the object down. You draw an arrow pointing down to show this.
Normal Force: If the object is sitting on a surface, there’s a support force pushing it up. This is shown with an arrow pointing up.
Friction: When there's resistance, like when you push a box, you show this force with an arrow pointing in the opposite direction of where the object is moving.
First Law (Inertia): FBDs show that if the total force on an object is zero, it will either stay still or keep moving at a constant speed.
Second Law (F=ma): By adding up all the forces in an FBD, you can find the net force. This helps you figure out the object’s acceleration using the formula .
Third Law (Action-Reaction): For every force in a free body diagram, there's another force that is equal and opposite.
In short, free body diagrams make it easier to understand forces. They help us use Newton’s Laws and predict how an object will move.