# Solution: What time will the ball strike the earth?

(Last Updated On: January 10, 2020)

#### Problem Statement: ECE Board April 1999

A ball is dropped from a building 100 m high. If the mass of the ball is 10 gm after what time will the ball strike the earth?

A. 4.52 sec

B. 4.42 sec

C. 5.61 sec

D. 2.45 sec

The ball will strike the earth in 4.52 seconds.

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