The satellite moves at constant speed in a circular orbit. Underline the items in the list below that are scalars: acceleration, force, mass, speed, velocity.
State what is meant by velocity.
Explain why the velocity changes.
Explain what causes this satellite to follow a circular orbit.
A rocket carries the satellite into orbit. The rocket and fuel together have a combined mass of $40\,000\,\text{kg}$ and a total weight of $400\,000\,\text{N}$. The upward resultant force on the rocket is $50\,000\,\text{N}$. Calculate the thrust produced by the rocket engine.
Calculate the acceleration of the rocket.
In the first four minutes after take-off, the rocket's acceleration is uniform. State what is meant by a uniform acceleration.
Fig. 9.3 outlines the rocket's motion during the first 12 minutes. On Fig. 9.4, sketch the rocket's speed-time graph for the first 12 minutes. You do not need to include speed values.
State how the speed-time graph in (ii) may be used to determine the distance travelled by the rocket.