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Two balls are dropped to the ground fro...

Two balls are dropped to the ground from different height . One ball is dropped 2.0s after the other, but both strike the ground at the same time 5.0 s after the 1 st is dropped.
a) What is the different in the heights from which they were dropped ?
b) From what height was the first ball dropped ?

A

78.4 m, 122.5 m

B

80 m, 250 m

C

40 m, 80 m

D

140 m, 180 m

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