Structures and Shapes - Different forces can act upon one object
Different forces can act upon one object
One of Newton's laws tells us that different forces can act on a single object at the same time, as when two soccer players kick the ball at the same time. One has exerted force on the ball toward the goal; the other has exerted force in another direction. If the two players kick with precisely the same energy in exactly opposite directions, then the ball will remain motionless. Two kicks that are not equal in energy and not opposite in direction, however, will send the ball flying sideways off the field. This combined force is called a resultantA force that results from the combined action of two other forces..
Standing a single playing card on its edge is nearly impossible. Two cards, however, can be stood on edge quite easily. This is because the
two cards can be made to exert two equal and...
[The entire page is 313 words long]
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