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OpenStudy (anonymous):
A block of mass 30 kg is being brought down by a chain. If the block acquires a speed of 40cm/s in dropping down 2m. The work done by the chain during the process will be..??
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OpenStudy (anonymous):
if g=10m/sec then work=600+2.4=602.4J
OpenStudy (anonymous):
Is the answer 0.6joule??
OpenStudy (anonymous):
pe lost = mgh = 30 . 10 . 2= 600j ke gained = 0.5. 30 . 0.16 = 2.4 j by con of energy pe= ke + wdone work = 597.6j (negative) as the displacement is opp to force of the rope.
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