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5-WE EXPLORE FORCES AND MACHINES-N.S-4TH

 5-1-WHAT ARE FORCES?

pag.86-87


STATIC ELECTRICITY EXPERIMENT



5-2-WHAT ARE MACHINES?

pag.88-89




5-3-HOW HAVE MACHINES CHANGED?

pag.90-91




5-4-HOW DO WE USE MACHINES IN DAILY LIFE?

pag.92-93




5-5-SIMPLE MACHINES PROJECTS

pag.94