a block of wood has dimensions 4.0cm x 5.0cm x 2.0cm. Its mass is 20.0g. how much does its weigh?
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20 g only it is the final ans
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The mass of the block of wood is 20 gm or 0.02 kg.
Weight is the force, which which any body is attracted towards the surface of the earth.
Therefore, the formula for force will be used here also.
Force or weight = m * g
where g is the acceleration due to gravity, 9.8m/s²
and m is the mass of the body.
So, weight = 0.02 kg * 9.8 = 0.196 Newtons
N = kg.m/sec²
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