A pressure of 1000 pay act on a surface of area 15 cm sqby a block of mass 'm ' . Calculate m . Calculate the new pressure exerted by the same block if the area of contact with surface become 10 sq cm

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Solution

$f o r c e = w e i g t h = m g p r e s s u r e = f o r c e / a r e a f o r c e = p r e s s u r e \times a r e a m g = 1000 \times 15 \times 10^{- 4} m g = 1.5 m = 1.5 / 10 = 0.015 k g = 150 g n e w p r e s s u r e = f o r c e / n e w a r e a r = 1.5 / 10 \times 10^{- 4} = 1500 p a$

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