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Bogdan [553]
3 years ago
5

Application of pressure​

Physics
1 answer:
Nitella [24]3 years ago
6 0

Explanation:

Pressure is the force per unit area acting on a body.

The more the force acting on a small area, the more pressure such a body can be said to exert.

Application of pressure:

  • The heart pumps blood round the body by the contraction and dilation of heart muscles which gives pressure to moves blood.
  • Tires are pumped with air to give them more pressure to carry a car and move.
  • Taps are designed to supply the most pressure in order to release water from overheads.
  • Bullets are fired with pressure.
  • Pressure is used to do a lot of industrial works.
  • Atmospheric pressure ensures there is available air in the biosphere.

learn more:

Pressure brainly.com/question/4472505

#learnwithBrainly

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finlep [7]
<h2>Option 2 is the correct answer.</h2>

Explanation:

Elastic collision means kinetic energy and momentum are conserved.

Let the mass of object be m and M.

Initial velocity object 1 be u₁,  object 2 be u₂

Final velocity object 1 be v₁,  object 2 be v₂

Initial momentum = m x u₁ + M x u₂ = 3 x 8 + M x 0 = 24 kgm/s

Final momentum = m x v₁ + M x v₂ = 3 x v₁ + M x 6 = 3v₁ + 6M

Initial kinetic energy = 0.5 m x u₁² + 0.5 M x u₂² = 0.5 x 3 x 8² + 0.5 x M x 0² = 96 J

Final kinetic energy = 0.5 m x v₁² + 0.5 M x v₂² = 0.5 x 3 x v₁² + 0.5 x M x 6² = 1.5 v₁² + 18 M

We have

            Initial momentum = Final momentum

            24 = 3v₁ + 6M

            v₁ + 2M = 8

             v₁ = 8 - 2M

            Initial kinetic energy = Final kinetic energy

            96 = 1.5 v₁² + 18 M

            v₁² + 12 M = 64

Substituting  v₁ = 8 - 2M

           (8 - 2M)² + 12 M = 64    

           64 - 32M + 4M² + 12 M = 64    

            4M² = 20 M

               M = 5 kg

Option 2 is the correct answer.  

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