A block of weight 45 n is at rest on a horizontal table an
A block of weight 4.5 N is at rest on a horizontal table. An upward vertical force of 2.2 N is applied to the block by means of a string. What is the magnitude of the force exerted by the block on the table top?
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a block of weight 45 n is at rest on a horizontal table an upward vertical force of 22 n is applied to the block by
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