What do they mean by identifying types of forces?

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libertylovescie
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Hm... My science study guide tells me to identify types of forces. What do they mean? Can you help me identify forces?:confused:
 
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Can you be more specific please?
 
um... their example is : what forces are being applied to a rock falling through the air?
 
libertylovescie said:
um... their example is : what forces are being applied to a rock falling through the air?

Well there are couple you may think of on top of your head.

For instance, we don't float in the air while we are on earth. This means that there is "what" acting on us?