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- 1. Balanced & unbalanced forces<br />WALT: To calculate the resultant force acting on an object<br />1st task… Name THREE forces and describe the effect of each force<br />
- 2. By the end of the lesson we…<br />Must…<br />Describe the effect of different forces<br />Should…<br />Explain the term ‘balanced forces’<br />Could…<br />Explain the term ‘unbalanced forces’<br />Calculate the resultant force<br />
- 3. Balanced and unbalanced forces<br />If two forces are acting on an object in opposite directions, the object will move in the direction of the larger force.<br />If the two forces are the same size but in opposite directions, they balance out. These forces are called balanced forces.<br />Video Clip<br />
- 4. 16 Newtons<br />50 Newtons<br />30 Newtons<br />25 Newtons<br />Unbalanced Forces<br />300 Newtons<br />100 Newtons<br />
- 5. Balanced Forces<br />
- 6. Balanced & unbalanced forces<br />Pushes and _________ are forces.<br />The force of gravity pulling towards the Earth is called ___________.<br />An object placed in water has a force called ________ pushing up on it.<br />When the forces acting on an object are equal and opposite, they are called ___________ ______.<br />If the forces are balanced, the object will stay still or carry on at the same speed in the same direction.<br />
- 7. Quick Re-cap<br />Switch on your Qwizdom handsets<br />
- 8. If two different forces are acting on an object in opposite directions, the object will:<br />Stay in the same place<br />Move in the direction of the larger force<br />Move in the direction of the weaker force<br />
- 9. Enter the correct answer<br />The forces on a person are _________<br />
- 10. Choose all that apply....If the forces are balanced an object will:<br />Stay still<br />Slow down<br />Carry on at same speed in the same direction<br />
- 11. HOMEWORK<br />Forces poster<br />Your task…<br />Produce a poster about what you have learnt so far about forces<br />Level 3: Explain what forces are<br />Give meanings and examples of forces, draw a force diagram e.g. of a fish<br />Level 4: Explain balanced & unbalanced forces <br />Explain what happens in a tug of war. How does a car keep at a steady speed? Draw force diagrams to help explain both<br />Level 5: Explain what density is & how it is measured<br />Draw a force diagram showing the forces acting on an object in water<br />

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