Physics-
General
Easy
Question
Two balls are dropped to the ground from different heights. One ball is dropped 2 s after the other but they both strike the ground at the same time. If the first ball takes 5 s to reach the ground, then the difference in initial heights is 
- 20 m
- 80 m
- 170 m
- 40 m
The correct answer is: 80 m
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