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Q.

From a 10 m high building a stone ‘A’ is dropped, and simultaneously another identical stone ‘B’ is thrown horizontally with an initial speed of 5 ms-1. Which one of the following statement is true?

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a

It is not possible to calculate which one of the two stones will reach the ground first

b

Both the stones (A and B) will reach the ground simultaneously

c

‘A’ stone reaches the ground earlier than ‘B’

d

‘B’ stone reaches the ground earlier than ‘A’

answer is B.

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Detailed Solution

h = 12gt2h and g are the same for both balls, so time of fall ‘t’ will also be the same for bot of them(h is vertical height).
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