Mathematics, 21.09.2021 05:50 krandall232

1. A small stone is projected vertically upwards with speed 20 m s-1 from a point O which is 5 m above horizontal ground. The stone is modelled as a particle moving freely under gravity. Find (a) the speed of the stone at the instant when it is 2 m above the ground, (b) the total time between the instant when the stone is projected from O and the instant when it first strikes the ground.

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