Do not write 0 8 Figure 11 shows a toy car in different positions on a racing track. outside the box Figure 11 Racing track C Loop Toy car D B 0 8. 1 The toy car and racing track can be modelled as a closed system. Why can the toy car and racing track be considered 'a closed system'? [1 mark] Tick () one box. The racing track and the car both have gravitational potential energy. The racing track and the car are always in contact with each other. The total energy of the racing track and the car is constant