State the difference between a vector quantity and a scalar quantity.
State one more vector quantity and one more scalar quantity.
An aeroplane moves in a straight line through the air with its engines at full power. The aeroplane's weight is 160 kN. There is also a force of 320 kN acting upwards on the aeroplane at $30^\circ$ to the horizontal. In the space below, use a graphical method to find the magnitude and direction of the resultant of these two forces. Use a scale of $1.0\,\text{cm} : 40\,\text{kN}$.
An aeroplane is moving in a straight line at constant height. The aeroplane accelerates. State the energy change occurring as the aeroplane accelerates.
While the aeroplane accelerates, the pilot keeps the engines at constant power. Eventually the aeroplane reaches a constant speed. Explain why the aeroplane stops accelerating and attains a constant speed.
At constant speed, the pilot turns the aeroplane onto a tight circular path. Explain why the aeroplane is accelerating even though its speed is unchanged.