A block of mass 2kg is lifted through a chain When block moves through 2m vertically the velocity becomes - Physics - Work Energy And Power

Question

A block of mass 2kg is lifted through a chain When block moves
through 2m vertically the velocity becomes 4m/s Work done by chain
force until it moves 2m is ( g= 10m/s^2) a)40J b) 24J c) 56J d)
none Explain

Anjali · Answer

Here net work done by chain will be Upward tension in chain - work
done by gravity T-mgh W E theorem T - mgh=dKE
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A block of mass 2kg is lifted through a chain. When block moves through 2m vertically the velocity becomes 4m/s. Work done by chain force until it moves 2m is ( g= 10m/s^2) a)40J b) 24J c) 56J d) none. Explain.