At 𝑡 = 0, a stone of mass 10 gm is thrown straight up from the ground level with a speed 10 𝑚/𝑠. After 1 𝑠, a second stone of the same mass is thrown from the same position with a speed 20 m/s. What is the position of the first stone from the ground level at that moment? (Take g = 10 𝑚/𝑠 2 )

Question : At 𝑡 = 0, a stone of mass 10 gm is thrown straight up from the ground level with a speed 10 𝑚/𝑠. After 1 𝑠, a second stone of the same mass is thrown from the same position with a speed 20 m/s. What is the position of the first stone from the ground level at that moment? (Take g = 10 𝑚/𝑠 2 )

(A) 10 𝑚

(B) 1 𝑚

(C) 2 𝑚

(D) 5 𝑚

Answer : option (D)

Solution :

At 𝑡 = 0, a stone of mass 10 gm is thrown straight up from the ground level with a speed 10 𝑚/𝑠. After 1 𝑠, a second stone of the same mass is thrown from the same position with a speed 20 m/s. What is the position of the first stone from the ground level at that moment? (Take g = 10 𝑚/𝑠 2 )
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