This document discusses balanced and unbalanced forces. It defines balanced forces as two forces of equal size acting in opposite directions, causing an object to stay still. Unbalanced forces are forces that are not equal, causing an object to move in the direction of the larger force. The document provides examples of different sized forces and instructs students on describing different forces and the terms "balanced" and "unbalanced forces." It includes homework of creating a poster explaining forces.

1. Balanced & unbalanced forces WALT: To calculate the resultant force acting on an object 1st task… Name THREE forces and describe the effect of each force

2. By the end of the lesson we… Must… Describe the effect of different forces Should… Explain the term ‘balanced forces’ Could… Explain the term ‘unbalanced forces’ Calculate the resultant force

3. Balanced and unbalanced forces If two forces are acting on an object in opposite directions, the object will move in the direction of the larger force. If the two forces are the same size but in opposite directions, they balance out. These forces are called balanced forces. Video Clip

4. 16 Newtons 50 Newtons 30 Newtons 25 Newtons Unbalanced Forces 300 Newtons 100 Newtons

5. Balanced Forces

6. Balanced & unbalanced forces Pushes and _________ are forces. The force of gravity pulling towards the Earth is called ___________. An object placed in water has a force called ________ pushing up on it. When the forces acting on an object are equal and opposite, they are called ___________ ______. If the forces are balanced, the object will stay still or carry on at the same speed in the same direction.

7. Quick Re-cap Switch on your Qwizdom handsets

8. If two different forces are acting on an object in opposite directions, the object will: Stay in the same place Move in the direction of the larger force Move in the direction of the weaker force

9. Enter the correct answer The forces on a person are _________

10. Choose all that apply....If the forces are balanced an object will: Stay still Slow down Carry on at same speed in the same direction

11. HOMEWORK Forces poster Your task… Produce a poster about what you have learnt so far about forces Level 3: Explain what forces are Give meanings and examples of forces, draw a force diagram e.g. of a fish Level 4: Explain balanced & unbalanced forces Explain what happens in a tug of war. How does a car keep at a steady speed? Draw force diagrams to help explain both Level 5: Explain what density is & how it is measured Draw a force diagram showing the forces acting on an object in water