(a)[1]
Define acceleration in words.
(b(i))[1]
Determine the acceleration of the rocket.
(b(ii))[2]
Show that the height of the rocket above the Earth’s surface 20 s after launch is 3.2 km.
(c(i))[2]
The rocket’s mass in (b) is $2.9 \times 10^6\,\text{kg}$. Take this mass to stay constant. For this rocket, from launch to the height it has reached 20 s after launch: calculate the gain in gravitational potential energy $\Delta E_{P}$.
(c(ii))[2]
Calculate the gain in kinetic energy $\Delta E_{K}$.
(c(iii))[2]
Determine the average power output of the rocket engines, taking resistive forces to be negligible.