Question

an object of mass 30kg is being brought down by a chain. if the block acquires a speed of 4 m/s in dropping down 2 m. find the work done by the chain during the process?

Answer 1

240 joules work is done by chain during the process

Answer 2

Given, mass=30kg, velocity=4m/s, displacement(s)=2m
Therefore, Work=force*displacement
W=f*s
=mv*s
=(30*4)*2
=120*2
=240Joules