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bagirrra123 [75]
2 years ago
11

a golf ball has a mass 0.046 kkg rests on a tee it is struck by a golf club with an effectiv mass of 0.22 and speed of 44 assumi

ng the collision is elastic, find the speed of the ball when it leaves the tee
Physics
1 answer:
Fiesta28 [93]2 years ago
6 0

Answer:

210 m/s

Explanation:

We will use this equation for an elastic collision:

  • m₁v₁ + m₂v₂ = m₁v₁ + m₂v₂  
  • The left side of the equation is before the collision; the right side is after the collision.

In this case, m₁ = mass of golf ball (0.046 kg) and m₂ = mass of the golf club (0.22 kg).

<h3><u>Left side of equation:</u></h3>

v₁ is 0 m/s since the ball is at rest on the tee.

v₂ is 44 m/s, given in the problem.

<h3><u>Right side of equation:</u></h3>

v₁ is what we are trying to find.

v₂ is 0 m/s since the ball will be at rest on the ground.

<h3>⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯</h3>

Plug these values into the elastic collision equation:

  • (0.046 kg)(0 m/s) + (0.22 kg)(44 m/s) = (0.046 kg)(v₁) + (0.22 kg)(0 m/s)

Simplify this equation.

  • (0.22 kg)(44 m/s) = (0.046 kg)(v₁)  

Get rid of the units.

  • (0.22)(44) = 0.046v₁

Multiply the left side of the equation.

  • 9.68 = 0.046v₁

Divide both sides by 0.046.

  • 210.434782609 = v₁
  • 210 m/s = v₁

The speed of the ball when it leaves the tee is about 210 m/s.

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7 0
3 years ago
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Ratling [72]

The atomic number is the simply the number of protons in the atom. So in the first row with atomic number 2, the number of protons is 2.

If the atom has no charge, which I think you can assume for all of these, the number of electrons is equal to the number of protons. So the number of electrons is also 2.

The number of neutrons (which are the particles with no charge in the nucleus) is simply the mass number minus the atomic number i.e. 4 - 2 = 2.

The isotopic symbol is the symbol which is found on the periodic table of elements. There are 2 numbers associated which each element on the table. The larger is the mass number and the smaller is the atomic number. The atomic number or number of protons is what identifies the element. Looking at the periodic table ( https://sciencenotes.org/wp-content/uploads/2015/01/PeriodicTableOfTheElementsBW.pdf or https://simple.wikipedia.org/wiki/Periodic_table_(big) ), it can be seen that the element on the first row above with an atomic number of 2 is Helium with a symbol He. The number that is included with the name is simply the mass number which is 4 in this case, which tells us that this type of helium has 2 neutrons.

Another type (or isotope) of helium is Helium-3 which has one neutron.

Try the next row and post back if you have trouble with it

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