A body is thrown vertically upwards a velocity the instants when it goes past a point 100 m from the ground in its upward and

Question

A body is thrown vertically upwards a velocity the instants when it goes past a point 100 m from the ground in its upward and downward journey g 9 8 m s 4 28 s A stone is thrown vertically upwards with a velocity of 20 m s When will its speed be 6 m s and at what altitude 1 43 s 2 65 s 18 6 m

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