ANSWER Mrs. Beckley is carrying Allysa in a baby backpack (Allysa insists!). Allysa weighs 50 kg. Mrs. Beckley would be doing MORE work if this part about Allysa changed (and we don’t mean her diaper)
QUESTION What is: IF ALLYSA’S WEIGHT CHANGED…..say her weight changed to 560 kg.
ANSWER A complex machine is one that uses both of these
QUESTION What is: MANY SIMPLE AND COMPOUND MACHINES
ANSWER A bicycle that moves when you pedal it can move because of this type of energy