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hodyreva [135]
3 years ago
13

A person is lying on a diving board 2.00 m above the surface of the water in a swimming pool. She looks at a penny that is on th

e bottom of the pool directly below her. To her, the penny appears to be a distance of 8.00 m from her.
Required:
What is the depth of the water at this point?
Physics
1 answer:
wlad13 [49]3 years ago
8 0

Answer:

7.98 m

Explanation:

In the given question,

distance above surface= 2 m

Distance penny from person = 8 m

Since the swimming pool is filled with water and atmosphere has air therefore the refractive index phenomenon will occur.

The refractive index of water: air is 4/3 (1.33).

Using the formula, 4/3 = real depth, apparent depth

real depth= 4/3 x apparent depth

Now, calculating apparent depth = 8 - 2

= 6 m

therefore, real depth =  4/3 x apparent depth

= 1.33 x 6

= 7.98

thus, 7.98 m is the real depth of water.

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Answer:

after 6 second it will stop

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Explanation:

given data

speed = 12 m/s

distance = 100 m

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to find out

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solution

we will apply here first equation of motion that is

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put here all value in equation 1

0 = 12 + (-2) t

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and

for distance we apply equation of motion

v²-u² = 2×a×s  ..........2

here v is 0 u is 12 and a is -2 and find distance s

put all value in equation 2

0-12² = 2×(-2)×s

s = 36 m

so  he travel 36 m to stop

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