Achain 71 meters long whose mass is 24 kilograms is hanging over the edge of a tall building and does not touch the ground.

how much work is required to lift the top 5 meters of the chain to the top of the building?

use that the acceleration due to gravity is 9.8 meters per second squared.

your answer must include the correct units.

Iwould sure like to answer your question but i honestly just don’t know

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)