Question

7)

Answer 1

http://prntscr.com/4bnzz0

Answer 2

The work done by car = energy provided by petrol.
Work=F*d where d is distance. Since car moves with constant speed the engine must produce the force which is equal to resistance of motion. But only 25% of energy provided by petrol can be used to move the car, hence F*d=0.25*. You can now calculate d

Answer 3

0,25*E

Answer 4

E represents ..?

Answer 5

Energy=40MJ

Answer 6

I got it!
Thanks @Fifciol

Answer 7

yw:)