Driving on asphalt roads entails very little rolling resistance, so most of the Correct energy of the engine goes to overcoming air resistance. But driving slowly in dry Correct answer is shown. Your answer 4982 W was either rounded differently or used a different number of significant figures than required for this part. sand is another story. If a 1600 kg car is driven in sand at 5.3 m/s , the coefficient of rolling friction is 0.080. In this case, nearly all of the energy that the car uses to move goes to overcoming rolling friction, so you can ignore air drag in this problem. Part C If the car gets 15 miles per gallon when driving on sand, what is the car's efficiency? One gallon of gasoline contains 1.4 x 10" J of chemical energy, one mile is 1609 m. Express your answer as a percentage. emplates Symbols undo redo reset keyboard shortcuts Help 2 = 22.6 Submit Previous Answers Request Answer Incorrect; Try Again: 4 attempts remaining