How much more intense is sound at 40 db than sound at zero db?
1 answer:
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Answer and Explanation:
The ball is bouncing to a height of 1/3 of its previous height this is a type of geometric sequence the total distance can be found by the sum of geometric sequence
For example let the initial height is 243 fit
After one bounce it will reach 243/3 =81 feet
After second bounce 81/3=27 feet
After third bounce 27/3 =9 feet
After fourth bounce 9/3 =3 feet
So a sequence is formed that is 243,81,27,9,3..........
Here
Sum of infinite GP =
From this formula we can find the total distance traveled by the ball
Answer:
The force is
Explanation:
The diagram for this question is shown on the first uploaded image
From the question we are told that
The weight of the gate is
The vertical component of F is
From the diagram , taking moment about the pivot we have
Where is the weight of the gate evaluated as
=>
=>
=>
