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Komok [63]
3 years ago
11

While riding on an elevator descending with a constant speed of 2.7 m/s , you accidentally drop a book from under your arm. How

long does it take for the book to reach the elevator floor, 1.0 m below your arm?
Physics
1 answer:
Angelina_Jolie [31]3 years ago
4 0

Answer:

0.45 s.

Explanation:

From Newton's equation of motion,

s = ut + 1/2gt²........................ Equation 1

Where s = distance, u = initial velocity, a = acceleration, t = time

Given: s = 1.0 m, u = 0 m/s (dropped from height), g = 9.81 m/s²

Substituting into equation 1,

1 = 0(t) + 1/29.81(t²)

1 = 9.81t²/2

2 = 9.81t²

t² = 2/9.81

t² = 0.204

t = √(0.204)

t = 0.45 s.

Hence it takes 0.45 s for the book to reach the elevator floor.

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babunello [35]

Answer:

While a body is said to be in motion if it changes its position with respect to immediate surroundings.

A body is said to be in uniform motion if it covers equal distances in equal interval of time.

A body is said to be in non-uniform motion if it covers unequal distances in equal interval of time or vice-versa

4 0
2 years ago
The human ear canal is about 2.3 cm long. If it is regarded as a tube open at one end and closed at the eardrum, what is the fun
mariarad [96]

Answer:

For the given conditions the fundamental frequency is 3728.26 Hertz

Explanation:

We know that for a pipe open at one end and closed at other end the fundamental frequency is given by

f=\frac{V_{s}}{4L}

where

f is the fundamental frequency

V_{s} is the speed of sound in air in the surrounding conditions.

L = Length of the pipe

Applying values we get and using speed of sound as 343m/s we get

f=\frac{343}{4\times 2.3\times 10^{-2}}=3728.26Hz

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3 years ago
A typical land snail's speed is 12.2 meters per hour. How many miles will the snail travel in one day(24hrs)?
algol13
The snail will go <span>0.18193752 miles </span>
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Water is returned from earth’s surface to the atmosphere by
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Answer:

Evaporation

Explanation:

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Ipaliwanag ang paggalang
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paraan ito ng pagrerespeto

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