Question

write any two application of gravity. A Stone is dropped freely from 45m height of the tower, it reaches the ground in 3 seconds. calculate acceleration due to gravity of that Stone.
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Answer 1

Answer:

Applications:

running a cuckoo clock

running a hydroelectric power station

Stone problem: not enough information … we don’t know the air resistance. In 45m most stones would have reached terminal velocity.

If you neglect air resistance, so only gravity is acting, then you find the acceleration due to gravity the same way you would find the acceleration of anything covering a known distance in a known time under constant acceleration.

The equation is:

[math]s = ut + \frac{1}{2}at^2[/math]

… remember it, this equation is your friend.

Answer 2

Explanation:

here is your answer

with solution