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8 marksMotions

CAPE Physics Unit 1 · 2002 · Paper 2 · Question 5(a)(i)

In another galaxy, planet P has a circular orbit with the same radius as Earth's orbit. The masses of the suns in the two galaxies are S_E and S_P. Planet P completes its orbit in half the time it takes Earth.

Show that the mass of the Sun in the Earth's orbit is four times the mass of the sun in Planet P's orbit.

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Other parts of this question

  1. 5(a)(ii)Show that the period of the planet, P, is given by T = 2π * sqrt(r^3 / GM_P), where M_P is the mass of the planet and r the radius of the orbit.[8 marks]
  2. 5(b)Calculate the gravitational force of attraction.[2 marks]
  3. 5(c)Calculate the distance between the planet and its sun.[3 marks]
  4. 5(d)Calculate a value for g' the acceleration due to gravity on planet P.[4 marks]
  5. 5(e)What will he weigh on planet P?[3 marks]

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