Determination of the acceleration of free fall using electromagnet and 2 light gates?

A steel sphere is released from an electromagnet and falls under gravity. As it falls, it passes through 2 light gates which switch an electronic timer on and off. Now we know how long a freely falling object takes to pass through a known distance, assuming air resistance is negligible. So how is the... show more A steel sphere is released from an electromagnet and falls under gravity. As it falls, it passes through 2 light gates which switch an electronic timer on and off.
Now we know how long a freely falling object takes to pass through a known distance, assuming air resistance is negligible.
So how is the acceleration of free fall calculated?
I need equations! thanks!
1 answer 1