A marble rolls along the track below with no friction. The sequence of positions on the track listed in order from the lowest kinetic energy to the highest kinetic energy is:

coil wire, increase current, put iron inside the coil

dopamine..

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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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr