How are simple machines powered? I need help fast!!

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Explanation:

A simple machine uses a single applied force to do work against a single load force

A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load. The ratio of the output to the applied force is called the mechanical advantage.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement