(a)[1]
Define gravitational field strength at a point.
(b)[3]
Calculate the radius of the satellite’s orbit.
(c(i))[2]
The satellite’s rockets are fired so that it moves into a different circular orbit with a period of $150\,\text{minutes}$. The change in the satellite’s mass may be assumed to be negligible. Show that the radius of the new orbit is $9.4 \times 10^{6}\,\text{m}$.
(c(ii))[1]
State, with a reason, whether the gravitational potential energy of the satellite increases or decreases.
(c(iii))[3]
Determine the size of the change in the gravitational potential energy of the satellite.