8. A stone is dropped into a deep well and is heard to hit the water 9.6 sec after being dropped. Determine the depth of the well. 9. The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the deck to the street below. 10. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 3.711 m/s?. Determine the time for the feather to fall to the surface of the moon.

8. A stone is dropped into a deep well and is heard to hit the water 9.6 sec after being dropped. Determine the depth of the well. 9. The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the deck to the street below. 10. A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 3.711 m/s?. Determine the time for the feather to fall to the surface of the moon.