Solve the given problem:
 
A ball is dropped from the top of a building. Using a stop clock, the time taken to reach the ground is noted as \(7\ seconds\). Taking \(g\ =\ 10\ \frac{m}{s^2}\) , calculate the height of the building using the equation of motion.
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Free fall 
 
Initial velocity =   \(m\)
 
Displacement =   \(m\)