zarqahidayat94 zarqahidayat94
  • 05-10-2022
  • Physics
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A boy drops a ball from rest from the top of a building. At the same time, his friend throws a ball vertically upwards from the base of the building at a speed of 30ms^-1, two balls collide after 1.8s. Find the distance from the grownd to the top of the building.

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