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Tanya [424]
3 years ago
8

A 15kg object strikes the ground with 2000J of kinetic energy after freely falling from rest. How far above the ground was the o

bject when it was released?
Physics
1 answer:
arsen [322]3 years ago
8 0

Answer:

Explanation:

Find the final velocity at which it struck the ground by using the kinetic energy formula.

KE=\frac{1}{2} mv^2

2000=\frac{1}{2} (15)v^2\\v=16.33

Now use kinematics to solve for the vertical displacement. We were given the initial velocity and acceleration can be assumed to be 9.8

V^2=V^2_i+2a(y_f-y_i)\\16.33^2=0^2+2(9.8)(y_f-y_i)

Δy = 13.6 meters

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Answer:

The value is  |v| = 7.39 \  m/s

Explanation:

From the question we are told that

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3 years ago
Erwin Schrödinger developed the quantum model of the atom. What scientific knowledge was necessary for Schrödinger’s work?
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The scientific knowledge was necessary for Schrödinger’s work is the discoverd of electron.

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Thomson carried out new experiments that led him to conclude that cathode rays were formed by particles that have a negative charge. Later, Thomson proved that these rays were deflected by applying an electric field. Thus, these particles were called electrons.

The discovery of the electron allowed Schrodinger to explain quantum models that are based on how electrons behave.

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6 0
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