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3 years ago

14

If you weigh 690n on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and

a diameter of 19.0 km ?]

1 answer:

NeTakaya3 years ago

5 0

-- If you weigh 690N on the Earth, then your mass is about

   (690N) / (9.8 m/s²) = 70 kg .

-- If your mass is 70 kg then your weight on that neutron star would be

      G M₁ M₂ / R²

   = (6.67 x 10⁻¹¹ N m²/kg²) (70 kg) (1.989 x 10³⁰ kg) / (19,000 m)²

   = (6.67 x 10⁻¹¹ x 70 x 1.989 x 10³⁰) / (3.61 x 10⁸) N

   = (6.67 x 70 x 1.989 x 10¹⁹) / (3.61 x 10⁸) N

   = 2.57 x 10¹³ Newtons .

(about 2,890,000,000 tons !)

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Answer:

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From the question we are told that

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Generally the resultant force acting on the child due to her weight and the frictional force is mathematically represented as

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Here F is the resultant force and it is represented as $F = ma$

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=> $H = 29.52 * 7.2$

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Generally from kinematic equation we have that

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=> $v = \sqrt{0.559^2 + 2 * 4.039 * 7.2}$

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