A miracle car with 100% efficient engine burns fuel having a 40 megajoules-per-liter ewnegery content

megajoules-liter
frictional-forces

#1

a miracle car with 100% efficient engine burns fuel having a 40 megajoules-per-liter ewnegery content. if air drag and overall frictional forces at highway speeds totals 1000N, what distance per liter can be achieved on the highway? (show work)

a.30km
b.40km
c.50km
d.more than 50km
e.need more information

Answer:

Energy/liter = Force * Distance/liter = 1000N * d/liter => d/liter = |Energy|/1000 m * 1/liter = 40 km/liter