Page 10 - SP015 Past Years PSPM Chapter 6 -14 Ver 2020

PHYSICS PSPM SEM 1 1999 - 2017

PSPM 2015/2016 SF017/2 No. 4(b)(iii)

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6. The radius and mass of planet Mars are 3390 km and 6.42  10 kg respectively.
Calculate the acceleration due to gravity at the surface of the planet. [2 m]

PSPM JUN 1999/2000 SF015/2 No. 5

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7. Density and radius of Earth are 5500 kg m and 6400 km respectively. By using
suitable equation, determine the gravitational acceleration on the surface of Earth.
[4 m]

PSPM 2007/2008 SF017/2 No. 3

8. At what altitude from the surface of the earth will the acceleration due to gravity be
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reduced by 10 percent? Radius of the earth = 6.4 × 10 m. [4 m]

PSPM JUN 1999/2000 SF015/2 No. 12(b)

9. (a) Explain qualitatively why the weight of a body on moon is less than its weight on
the surface of Earth. [4 m]

(b) Given radius of Earth and moon are 6399 km and 1782 km respectively.
Determine the relation between mass of Earth and moon if the weight of a body
on moon is 0.16 times its weight on Earth. [3 m]

PSPM 2017/2018 SF016/2 No. 4(b)(ii)

10. The international Space Station (ISS) is launched from the Earth and orbiting at the
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altitude of 350 km. The ISS has a weight of 4.22  10 N when it is measured on the
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surface of the Earth. Given the mass and radius of the Earth is 5.98  10 kg and
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6.38  10 m respectively, calculate the weight of ISS when in its orbit. [2 m]

Gravitational Potential Energy

PSPM 2002/2003 SF017/2 No. 3

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11. A satellite of mass 50 kg moves in an orbit at the height of 2  10 m from the surface
of Earth. Calculate

(a) the potential energy of Earth satellite system. [2 m]
(b) the gravitational acceleration exerted on the satellite. [2 m]

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(Given mass of Earth = 5.98  10 kg and radius of Earth = 6.37  10 m)

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