1) A solid exerts pressure of 20 Pa on a surface of 2m2.Find its weight.

2) Relative density of an object is 1.35. Will it float or sink in water?

p = 20 pa

area = 2m sq.

= f = pxa = 20x2=40N

Weight = F = 40N

2. density of water = 1gm/cm cube

relative density of the object = 1.35 gm/cm cube

rel. density = density of object/density of water = 1.35/1

=density od object = 1.35gm/cm cube.

since density of object density of water, it will S

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2) desity of water = 1 gm/cm3

relative density of the object = 1.35

let the density of the object be x

therefore, relative density of the object = desity of x / density of water

1.35 = x/1

1.35 = x

density of the object = 1.35 gm / cm3

since desity of the object desity of water

1.35 gm / cm3 1gm / cm3

the object will sink

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