A uniform chain of length $$2m$$ is kept on a table such that a length of $$60$$ cm hangs freely from the edge of the table. The total mass of the chain is $$4$$ kg. The work done in pulling the entire chain on the table is (Take$$ g $$=$$ $$ms-2)

Question

A uniform chain of length $$2m$$ is kept on a table such that a length of $$60$$ cm hangs freely from the edge of the table. The total mass of the chain is $$4$$ kg. The work done in pulling the entire chain on the table is (Take$$ g $$=$$ $$ms-2)

Infinity Learn · Accepted Answer

Mass of length $$2$$ m of the chain $$=$$ $$4$$ kgMass of length $$60$$ cm or $$0.60$$ m of the chain $$=$$ $$4$$×$$0.602$$ $$=$$ $$1.2$$ kgWeight of the hanging part of the chain $$=$$ $$1.2$$ ×$$10$$ $$=$$ $$12$$ NSince of centre of gravity of the hanging part lies at its $$mid-point$$, i.e., $$30$$ cm or $$0.30$$ mW $$=$$ $$12$$×$$0.30$$ $$=$$ $$3.6$$ J

A uniform chain of length 2m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. The work done in pulling the entire chain on the table is (Take g = ${ms}^{- 2}$ )

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A uniform chain of length 2m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. The work done in pulling the entire chain on the table is (Take g = ms-2)

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A uniform chain of length 2m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. The work done in pulling the entire chain on the table is (Take g = ${ms}^{- 2}$ )