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How Much Energy Can You Store in a Stack of Cement Blocks? – ANITH
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# How Much Energy Can You Store in a Stack of Cement Blocks?

## How Much Energy Can You Store in a Stack of Cement Blocks?

This is sort of awesome. It’s a concrete gravity battery. What? Yup. The idea is to even out the balance between power generation and power usage; like with any battery, this one allows you to store extra energy for use at a later time when demand is higher. Or maybe you could use solar power during the day to store energy in the battery to be used at night—you know, when the sun doesn’t shine.

So, how does this work? There are really two physics parts to this concrete battery: gravitational potential energy and electric motors.

### Gravitational Potential Energy

If you pick up a textbook from the floor and put it on a table, it will require about 10 Joules of energy—a unit where 1 J = 1 kg*m22/s2. We can calculate the change in energy by lifting things using the work-energy principle. This says that work done on a system is equal to the change in energy of that system, and also that work depends on the force pushing on that system and the distance the force moves. Here I am using “system” to mean some thing or collection of things.