Please answer Q4: 25marks and use the formula sheet if need it

Formula Sheet 1 MPG = 0.425 km/L TTW Travel distancexcalorific value fuel economy WTT = P, X TTW VEE timex (TTW+WTT)+WTW = Massxaccelerxtimexravel distance Friction torque is then calculated as T = F.r 2:TN Friction power is given by: P = 1000CQuestion 4: 25 marks For this quastion, we assume the following parameters for two electric cars. The air resistance, rolling resistance, power conversion losses can be neglected in the exercises. Vehicle Mass (kg) Battery ampere hour 2220 kg 270 Ah e fwe 1) Let us consider EV 1. How much kinetic energy is stored in a car driving 70 km/h? [3 marks] 2) The driver breaks the EV 1, and it takes the car 15 seconds to stop. What is the average generated power aver this time interval from regenerative braking? [3 marks] 3) During regenerative braking, what is the average C-rate of the battery charging when the car uses a 600V system? [4 marks] &) During regenerative braking, what is the average C-rate of the battery charging when the car uses an 450V system? [4 marks] Consider a scenario where EV 1, driving at 90 km/h, makes an emergency brake and takes 50 m to come to a standstill. Where required, refer to the equations of motions to answer the below questions: 5) How fast is the car decelerating? Assume that the car decelerates at a constant rate. [4 marks] 6) What is the braking force? [3 marks] 7) What is the average power generated while braking? [4 marks]