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A block of mass 30.0 kg is being brought...

A block of mass 30.0 kg is being brought down by a chain. If the block acquires as speed of `40.0 `cm/s` in dropping down 2.00 m ,find the work done by the chain during the process.

Text Solution

Verified by Experts

`W("all")=DeltaK =K_(f)-K_(i) =K_(f)`
`:. W_(mg) + W_("chain")=K_(f)`
or `W_("chain") =K_(f)-W_(mg) =1/2mv_(f)^(2)-mgh`
`=1/2 xx 30 xx (0.4)^(2)-30 xx 10 xx 2`
`=-597.6J`.
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