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Saturday 22 December 2012
UNIT 5 SPRINGS ( LESSION 1 )
SPRINGS RETURN TO ITS ORIGINAL SIZE AND SHAPE
1. A spring changes its size, shape and length when it is twisted, stretched or squeezed.
2. When a spring is released, it returns to its original size and shape.
*
Introduction about
twist, stretch , bend and squeeze
.
http://ppdhl.net/courseware/ScienceY3/cd3/lesson/main/
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