What is meant by free fall ? A ball is dropped from the roof of a building. It takes 10 seconds to reach the ground. Find the height of the building.
CBSE Class IX Science SA 1 ( 2 marks)
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The falling of a body from a height towards the Earth under the gravitational force of Earth
(with no other force acting on it) is called free fall.
h = ut + 1/2gt²
= 0×10+1/2×9.8×10²
Thus, the height of the building is = 490 m
(with no other force acting on it) is called free fall.
h = ut + 1/2gt²
= 0×10+1/2×9.8×10²
Thus, the height of the building is = 490 m
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