You use me everyday but let me rest at night. i have an identical twin beside me all the time. for some reason you always cover me up. i am not alive but i have a soul. what am i?

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

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up