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Marysya12 [62]
3 years ago
8

A ball is dropped from a 10 story building (30.0 m). How long does it take to hit the ground?

Physics
2 answers:
tensa zangetsu [6.8K]3 years ago
7 0
Answer: 1.428 seconds.
Ksivusya [100]3 years ago
7 0
Answer: 1.428 seconds
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Who is known as the "father of modern chemistry" because he first organized all known elements into four different
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Answer:

D. Henry Moseley

Explanation:

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Calculate the Potential Energy of an object that has a mass of 14-kg and is located at a height of 24-m?
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Acceleration is defined as the rate of change for which characteristic?
Alenkasestr [34]

1) C. velocity

Acceleration is defined as the rate of change of velocity per unit time. In formulas:

a=\frac{\Delta v}{\Delta t}

where

\Delta v is the change in velocity

\Delta t is the time interval

Therefore, the correct answer is C. velocity.


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Earth's gravity is a force, so it produces an acceleration on every object with mass located on the Earth's surface. This acceleration can be calculated, as it is given by the formula

g=\frac{GM}{r^2}

where

G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2} is the gravitational constant

M=5.98\cdot 10^{24} kg is the Earth's mass

r=6.37\cdot 10^6 m is the Earth's radius

By substituting these numbers into the formula, one can find that the acceleration due to Earth's gravity is g=9.81 m/s^2.

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3 years ago
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Why do astronauts' weights differ in space?
OLga [1]

Answer:

There is less gravitational force in space.

Explanation:

Gravity doesn't exist as it does on Earth. Earth's gravity is as 6 times stronger as it is on the moon.

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