Dark mode

Orbital mechanics — Question 8

Original QCE Vault practice · 1 mark

Q8 · Practice questionSimple familiar1 mark

QUESTION 8

The gravitational field strength at the surface of a spherical planet is

9.8\,\text{N kg}^{-1}

. At a distance of

2R

from the planet centre, where

R

is the planet radius, the field strength is approximately

(A)

2.45\,\text{N kg}^{-1}

(B)

4.90\,\text{N kg}^{-1}

(C)

9.8\,\text{N kg}^{-1}

(D)

19.6\,\text{N kg}^{-1}

ABCD

Question linkSyllabus coverage

Related questions

Q7 · Original practice · 1 mark
Two masses of $5.0\times10^{24}\,\text{kg}$ and $800\,\text{kg}$ are separated by $7.0\times10^6\,\text{m}$ between their centres. What is the gravitational force between them?
Orbital mechanics
Q9 · Original practice · 1 mark
Satellite B orbits the same planet at four times the orbital radius of satellite A. What is $T_B/T_A$ ?
Orbital mechanics
Q10 · Original practice · 1 mark
A satellite is in a circular orbit of radius $8.0\times10^6\,\text{m}$ around a planet of mass $6.0\times10^{24}\,\text{kg}$ . Its orbital speed is closest to
Orbital mechanics
Q13 · Original practice · 1 mark
For several moons orbiting the same planet, which quantity should be approximately constant?
Orbital mechanics