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LuckyWell [14K]
3 years ago
14

The ball is launched with total initial energy Einitial = mgho. When it reaches the bottom of the hoops, it now has a potential

ernergy of PE mghplat for m. How much kinetic energy must it have at that point? Omgho Omghplat formmgho mghplat form Omgho mghplat for m
Physics
1 answer:
NeX [460]3 years ago
4 0

Answer:

  K = m g (h₀ - h_plat)

Explanation:

Let's use energy conservation to solve this problem, write the energy at two points of interest

Initial. Higher

          E_initial = m g h₀

Final. Lower

          E_end = K + Ep

          E_end = ½ m v² + m g h_plat

Energy is conserved

          E_initial = E_end

          m g h₀ = K + m g h_plat

          K = m g (h₀ - h_plat)

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4 0
4 years ago
Before 2006, while Pluto was still considered a planet, people used this saying to remember the nine planet names: "My very exce
Serjik [45]

Answer:

Mother's Visit Evoked My Junior Sister's Unseen Niceness

Explanation:

Mother's  - M - stands for Mercury

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4 0
3 years ago
An airplane in the earth’s magnetic field can develop a voltage between its wingtips.
Svetradugi [14.3K]

Answer:

emf=0.125\ V

According to the Fleming's Left left hand rule we have higher potential on the right edge of the wing.

Explanation:

Given:

  • velocity of plane, v=250\ m.s^{-1}
  • magnetic field, B=5\times 10^{-5}\ T
  • angle between velocity and magnetic field, \theta=30^{\circ}
  • span of the wing, l=20\ m

We know:

emf=B.l.v\ sin\theta

emf=5\times 10^{-5}\times 20\times 250\times sin30^{\circ}

emf=0.125\ V

According to the Fleming's Left left hand rule we have higher potential on the right edge of the wing.

7 0
3 years ago
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Answer:

10g

Explanation:

As the Law of Conservation of Mass states that " Mass can neither be created nor be destroyed in a chemical reaction".

Though melting of tin isn't a chemical change, the same logic is applied here...

Hence,

The mass of tin will be 10 g itself...

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4 years ago
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Explanation:

The same thing happened in pressure cooker but the temperature inside is most higher.

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3 years ago
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