During the Construction of a High-Rise Building, a Worker Accidentally

Essay

During the construction of a high-rise building, a worker accidentally dropped his portable electric screwdriver from a height of 400 ft. After t sec, the screwdriver had fallen a distance of ft.
How long did it take the screwdriver to reach the ground?
__________ sec
What was the average velocity of the screwdriver between the time it was dropped and the time it hit the ground?
__________ ft/sec
What was the velocity of the screwdriver at the time it hit the ground?
__________ ft/sec