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3 years ago

Explain how the applied force and area which the force acts affect the pressure

Physics

1 answer:

Leto [7]3 years ago

4 0

<span> If a force is applied over a smaller surface area you get a larger <span>pressure</span></span>

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A projectile is shot directly away from Earth's surface. Neglect the rotation of the Earth.

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Explanation:

We shall apply law of conservation of mechanical energy for projectile being thrown .

Total energy on the surface = total energy at height h required

a ) At height h , velocity = .351 x ( 2 GM/R x h )

$\frac{-GM}{R} + \frac{m\times(.351\times\sqrt{2GM})^2 }{2R } = \frac{-GMm}{R+h} + 0$

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h = .14 R

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$\frac{-GM}{R} + \frac{m\times(.351\times2GM) }{2R } = \frac{-GMm}{R+h} + 0$

$\frac{-0.649GMm}{R} = \frac{-GMm}{R+h}$

h = .54 R

c ) least initial mechanical energy required at launch if the projectile is to escape Earth

= GMm / R + 1/2 m (2GM/R)

= 0

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