A stone is dropped from rest from the top of a tower. After 2 s, another stone is dropped from rest from the same point. Take g = 10 m/ $s^2.$ At the instant when the second stone has been falling for 2 s, the separation between the two stones is:
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Question

A stone is dropped from rest from the top of a tower. After 2 s, another stone is dropped from rest from the same point. Take g = 10 m/ $s^2.$ At the instant when the second stone has been falling for 2 s, the separation between the two stones is:

Options

G1 Physics · Accepted Answer

When the second stone has fallen for 2 s, the first has fallen for 4 s. First stone: s1 = (1/2)g(4)^2 = 80 m. Second stone: s2 = (1/2)g(2)^2 = 20 m. Separation = 80 - 20 = 60 m. Hence option C is correct.

A stone is dropped from rest from the top of a tower. After 2 s, another stone is dropped from rest from the same point. Take g = 10 m/s^2. At the instant when the second stone has been falling for 2 s, the separation between the two stones is: