Force and Motion

Objectives

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The Students Will be able to - Identify push or pull or both is involved when there is a motion - Understand that some forces act on contact and some are non-contact forces - When a force is applied, it can make things move, change direction or change its shape and size - Distinguish rest and motion and understand that they are relative - Infer motion is caused by application of force - Classify the different types of motion - Deduce the definition of average speed - Use and understand the unit of speed - Distinguish uniform and non-uniform motion - Compute time, distance and speed

Summary

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- Motion and rest are relative. - All things that are at rest can be seen as in motion from a different point of view, and all motion can be seen as rest from a different perspective. - Application of forces is implemented by a push or pull. Forces can be applied by animate as well as inanimate agency. - Application of forces result in motion from rest, increase or decrease in speed, change in direction, and distortion o the shape. - Some forces act only in contact; there are some which can even effect at a distance. - Average speed = distance travelled /time taken (s= d/t) - The motion can be classified according to the path, periodic or non-periodic as well as if the speed is uniform or nonuniform. - Unit of speed is m/s.