A radio transmitter is formed as a very tall, narrow cylinder. Wires stop it from falling over: one end of each wire is attached to the transmitter and the other end is anchored in the ground. The ground ends of the wires are a long way from the transmitter. Fig. 4.1 shows the transmitter and two of the wires.
(a(i))[1]
State the meaning of centre of gravity.
(a(ii))[1]
Explain why the radio transmitter would be a very unstable structure if the wires were removed.
(b(i))[1]
On Fig. 4.1, mark an arrow to indicate the force $T$ applied by wire W to the transmitter.
(b(ii))[3]
Describe how the moment from $T$ is found and show on Fig. 4.1 what is meant by any other words used in the description.
(c)[1]
State one other use of radio waves.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The point where the whole weight appears to act” …