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 )