Page 12 - SP015 Past Years PSPM Chapter 6 -14 Ver 2020

PHYSICS PSPM SEM 1 1999 - 2017

PSPM 2006/2007 SF017/2 No. 11(c)(i), (iii)

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18. A spherical asteroid has a radius of 12  10 m and a mass of 4  10 kg.

(a) Calculate the gravitational acceleration at the surface of the asteroid. [3 m]

(b) Suppose the asteroid spins about an axis through its centre with an angular speed
 . What is the value of  when a loose rock at the equator of the asteroid begins
to fly off its surface? [3 m]

PSPM 2011/2012 SF016/2 No. 4(c)

19. A 1000 kg satellite is in an orbit 350 km above the earth surface. Calculate the

(a) speed of the satellite. [2 m]

(b) period of the satellite. [2 m]
(c) radial acceleration of the satellite. [2 m]

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Given mass of Earth = 5.98  10 kg and radius of Earth = 6.4  10 m

PSPM 2013/2014 SF016/2 No. 4(c)(ii)

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20. The mass and radius of the earth are 5.974  10 kg and 6371 km respectively.
Calculate the period of revolution of a satellite that is 100 km above the earth surface.
[2 m]

PSPM 2014/2015 SF017/2 No. 4(c)(iii)

21. A satellite orbits Earth in a period of 24 hours so that it is always at the same point
above Earth surface. Calculate the radius of the orbit. The radius and the mass of Earth
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are 6.4  10 km and 5.98  10 kg respectively. [3 m]

PSPM 2015/2016 SF016/2 No. 4(c)

22. (a) Derive the period of a satellite motion. [2 m]

(b) Calculate the distance from the centre of Earth for a satellite to remain on the
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same location above the Earth equator. The mass of Earth is 5.97  10 kg.
[1 m]

PSPM 2016/2017 SF016/2 No. 4(c)(iii)

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23. The period of a moon orbiting Pluto is 4.8 days. The radius of the orbit is 4  10 m.
Calculate the mass of Pluto. [7 m]

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