Question

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 statements is true?
(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 1

the answer of your question is the option c because the initial speed of stone in more in vertically than in horizontally

Answer 2

Both stones reach the ground simultaneously since they both have the same acceleration in the vertical direction. The horizontal speed of the one stone remains constant since there are no horizontal forces acting on either stone.