Question

A tennis ball is hit horizontally from the top of a high building. It takes 4 seconds to reach the ground and it lands 80 m from the building.
What is the height of the building

Answer 1

Answer:

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Explanation:

Legs sink in dry sand on beach than wet sand because sand contains lots of air in them making them loose and light. ... When foot is set on wet sand, the pressure is distributed by the wet sand over a larger surface area, making it difficult for the sand to be displaced. Hence, legs do not sink in wet sand.