A solid cylinder of iron of density 7.6gcm−3, has length 14cm and area of cross section 10cm2. It is suspended from a spring balance. Find the reading of the spring balance.
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Solution
Given, d=7.6gcm−3 l=14cm A=10cm2 Density=MassVolume ⇒7.6=m10×14 ⇒m=1064g=1.064kg Weight=mg=1.064×10=10.64N Spring balance measures weight and its reading will be 10.64N