Efficiency of a 10%-Efficient Car Engine: Energy Transfer and First Steps

[spokorne]

A 10%-efficient car engine accelerates the 1700 kg car from rest to 18 m/s.

How much energy is transferred to the engine by burning gasoline?

What should be my first step in attempting this problem?

 

[rock.freak667]

Ask yourself these questions:
1)What is the definition of efficiency?
2) If the car starts from rest and then to 18m/s, what kind of energy will it possess?