The height of the observation deck of the Empire State Building is 380 m. If you dropped a penny from this height, how fast would it be going when it struck the ground? Assume there is no air resistance.

Given :

The height of the observation deck of the Empire State Building is 380 m.

A penny is dropped from this height.

To Find :

How fast would it be going when it struck the ground.

Solution :

Initial speed, u = 0 m/s.

We know, speed of object free falling is given by :

Here, g = 9.8 m/s² = acceleration due to gravity.

Putting all values in above equation, we get :

Hence, this is the required solution.

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