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3 years ago

A ball thrown straight up takes 1.89s to reach a height of 41.6m.

Physics

1 answer:

yulyashka [42]3 years ago

8 0

Answer:

Explanation:

average velocity is 41.6/1.89 = 22.0 m/s

initial velocity u is

22.0 = (u + u - 9.81(1.89))/2

44.0 = 2u - 18.5

62.56 = 2u

u = 31.3 m/s

max height is

v² = u² + 2as

s = (v² - u²) / 2a

s = (0² - 31.3²) / (2(-9.81)) = 49.9 m

49.9 = 41.6 = 8.27 m higher

In process numbers have been rounded to 3 s.d. for reporting purposes.

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A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is?

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max2010maxim [7]

Answer:

K = -½U

Explanation:

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U = -GMm/R

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