Answers

2015-10-17T11:16:37+05:30
Length of side of cubical box = 3cm = 0.03m
base of a cube is a square. 
Area of base(A) = 0.03m×0.03m = 0.0009 m²
The weight of the block = W

Pressure exerted = 5 Pa
⇒ Weight/Area = 5 Pa
⇒ W / 0.0009 = 5 Pa
⇒ W = 5×0.0009
⇒ W = 0.0045N

Weight of the block is 0.0045N
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