A square iron block with a mass of 7900g is placed in the center of a horizontal table with an area of 200cm & sup2; to calculate the pressure of the iron block on the table
7900g=7.9kg,7.9×10N/kg=79N.
200cm²=0.02m²
79N÷0.02m²=3950Pa
A: the pressure is 3950 Pascal
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