Since Venus remains $1.1 \times 10^{11}\,\text{m}$ from the Sun, calculate $T_v$.
Explain why speed is classed as a scalar quantity.
Velocity is a vector quantity. Explain what happens to the velocity of Venus while it orbits the Sun.
Venus experiences a resultant force as it moves around the Sun. The force acts at right angles to Venus’s direction of motion. State why this force is needed.
Fig. 9.1 shows Venus’s orbit around the Sun. On Fig. 9.1, draw an arrow to indicate the resultant force on Venus.
State what produces the force acting on Venus.
One planet in the Solar System lies closer to the Sun than Venus. State the name of this planet.
Compare the time needed for this planet to complete one orbit of the Sun with $T_v$ and explain why they differ.