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borishaifa [10]
3 years ago
13

Sound travels faster in: steel water sir

Physics
1 answer:
alukav5142 [94]3 years ago
8 0
Sound travels better in water
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29,032′

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Please help with these physics problems 1. A soccer ball is dropped from the top of a building. It takes 5.8 seconds to fall to
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Answer:

1.) h = 164.8 m

2.) U = 49.1 m/s

3.) t = 1.43 seconds

Explanation:

1.) A soccer ball is dropped from the top of a building. It takes 5.8 seconds to fall to the ground. The height of the building is...? 

Since the soccer ball is dropped from the building, the initial velocity U will be equal to zero

Using second equation of motion

h = Ut + 1/2gt^2

Substitutes the time into the formula

h = 1/2 × 9.8 × 5.8^2

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2. The Falcon 9 launches to a height of 123 meters. What is its vertical initial velocity?

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U^2 = 2410.8

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3. An apple falls from rest off a 10.m m tree. How long will it take before it hits the ground?

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h = Ut + 1/2gt^2

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