Compléter SIMPLE MACHINES Version en ligne - Review of vocabulary related to the topics "machines" 3rd PRIMARY par Jesús Pérez Perez 1 pulley effort help machines move simple energy travel work parts 1 . Machines us to do something . 2 . Machines make easier . 3 . Simple machines often have one or two . 4 . An inclined plane reduce the you need to weights . 5 . Machines use . 6 . A lever , a pulley , a wheel are . 7 . We use a to lift weights . 8 . A wheel helps us to .
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