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Sergio039 [100]
2 years ago
5

A young diver is practicing his skills before an important team competition. Use the diagram below in order to analyze the energ

ies of the diver and complete the statements below.
Where m = mass (kg), g = 9.8 m/s2, v = velocity (m/s), h = height (m), KE = kinetic energy (J), and GPE = gravitational potential energy (J).
Use the equations above to answer the following questions.

A diver with a mass of 90 kg is at a height of 10 m, and he has not jumped off of the board yet (v = 0 m/s). When the diver reaches a height of 5 m (Point C), his gravitational potential energy is

A. 1350 J

B. 8820 J

C. 4410 J

D. 0 J

and his velocity is

E. 4.5 m/s

F. 0 m/s

G. 3.2 m/s

H. 9.9 m/s

Please help will mark brainliest

Physics
2 answers:
nika2105 [10]2 years ago
7 0
  • h=10m-5m=5m
  • m=90Kg
  • g=9.8m/s^2

\\ \sf\longmapsto GPE=mgh

\\ \sf\longmapsto GPE=90(5)(9.8)

\\ \sf\longmapsto G PE=4410J

Now

It's converted to kinetic energy while reaching ground.

\\ \sf\longmapsto K.E=4410

\\ \sf\longmapsto \dfrac{1}{2}mv^2=4410

\\ \sf\longmapsto 90v^2=8820

\\ \sf\longmapsto v^2=98

\\ \sf\longmapsto v=9.9m/s

Done

Lyrx [107]2 years ago
5 0

Answer:

Hope it will help you a lot.

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6 0
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Can you help me please?
egoroff_w [7]
<h3>Answer</h3>

option B)

19N

<h3>Explanation</h3>

If the object is at equilibrium, then the net force acting upon the object should be 0 N. Thus, if all the forces are added together, horizontal and vertical forces separately, then the resultant force (the vector sum) should be 0 Newton.

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50cos(40) - 40cos(25) + 30cos(55) + x = 0

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nataly862011 [7]
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3 years ago
A spring is hanging from the ceiling. When a 250 gram of mass is attached to the free end, the spring elongates by 5 cm. The spr
lord [1]

Answer:

k = 49 N/m

Explanation:

Given that,

Mass, m = 250 g = 0.25 kg

When the mass is attached to the end of the spring, it elongates 5 cm or 0.05 m. We need to find the spring constant. Let it is k.

The force due to mass is balanced by its weight as follows :

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3 years ago
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