1. Force & Movement D. Crowley, 2008

2. Force & Movement  To be able to explain how the force behind an object affects its movement

3. Acceleration  If both of these vehicles had exactly the same size engine, which would reach 60 first? versus Mass >3000kgMass 1200kg  The smaller mini would get to 60 before the large range rover as it has a much smaller mass - if the engine is the same, then the force pushing it forward is the same, so a smaller mass would equal faster acceleration Acceleration = Force  Mass  The smaller mini would get to 60 before the large range rover as it has a much smaller mass - if the engine is the same, then the force pushing it forward is the same, so a smaller mass would equal faster acceleration Acceleration = Force  Mass

4. Acceleration  Draw force arrows needed for each car to accelerate them both at the same rate versus  As the range rover is almost 3x as heavy as the mini, the force needed to accelerate it at the same rate as the mini needs to be 3x as big  This is why the force arrow for the range rover is so much bigger (and why in real life, it has a much more powerful engine)  As the range rover is almost 3x as heavy as the mini, the force needed to accelerate it at the same rate as the mini needs to be 3x as big  This is why the force arrow for the range rover is so much bigger (and why in real life, it has a much more powerful engine)

5. Force Experiment  How could you investigate how changing the force behind an object will affect how far it moves Apparatus at your disposal include: -  Rubber bands  Force meters  String  Meter rulers  Stop watches  Ramps  Margarine tubs  Plasticine  Sellotape  How could you investigate how changing the force behind an object will affect how far it moves Apparatus at your disposal include: -  Rubber bands  Force meters  String  Meter rulers  Stop watches  Ramps  Margarine tubs  Plasticine  Sellotape

6. Force Experiment  Remember, whatever plan you have chosen to follow, you must only change 1 independent variable (the force applied)  Every other variable must be kept constant (i.e. the mass of the margarine tub, the slope it must travel across etc…)  You may have decided to see how different forces affect the distance traveled by a margarine tub containing a given mass of plasticine - you will need to measure how far the tub traveled when different forces (at least 5 different forces) were applied, repeating each experiment at least 3x  Remember, whatever plan you have chosen to follow, you must only change 1 independent variable (the force applied)  Every other variable must be kept constant (i.e. the mass of the margarine tub, the slope it must travel across etc…)  You may have decided to see how different forces affect the distance traveled by a margarine tub containing a given mass of plasticine - you will need to measure how far the tub traveled when different forces (at least 5 different forces) were applied, repeating each experiment at least 3x Start pointEnd point Force 10N 15N 20N Etc… Distance traveled

7. Results Force (N) Distance traveled by object (cm) Measurement 1Measurement 2Measurement 3Average 10 15 20 25 30

8. Conclusion  Analyses your results, and conclude your findings  Evaluate your experiment, and then suggest improvements…  Hopefully you found that as the force increased, the distance traveled by the object increased  Analyses your results, and conclude your findings  Evaluate your experiment, and then suggest improvements…  Hopefully you found that as the force increased, the distance traveled by the object increased  As the force increased, whilst frictional forces remained fairly static (although there would be slightly more friction with the heavier mass)