Physics and Astronomy Outreach Program at the University of British Columbia Physics and Astronomy Outreach Program at the University of British Columbia Multiple-Choice Questions TRANSPORTATION Energy Use in Cars 3: Rolling Resistance

Physics and Astronomy Outreach Program at the University of British Columbia Physics and Astronomy Outreach Program at the University of British Columbia Energy in Cars 3 You are driving across the country and expect to be going a mostly constant speed. How much fuel do you save if you travel at 90 km/h rather than 100 km/h? A.You will burn 5% less fuel B.You will burn 10% less fuel C.You will burn 20% less fuel D.We can’t tell without knowing the car’s CD and Area E.We can’t tell without knowing the distance traveled.

Physics and Astronomy Outreach Program at the University of British Columbia Physics and Astronomy Outreach Program at the University of British Columbia Energy in Cars 3 You are driving across the country and expect to be going a mostly constant speed. How much fuel do you save if you travel at 90 km/h rather than 100 km/h? A.You will burn 5% less fuel B.You will burn 10% less fuel C.You will burn 20% less fuel D.We can’t tell without knowing the car’s CD and Area E.We can’t tell without knowing the distance traveled.

Physics and Astronomy Outreach Program at the University of British Columbia Physics and Astronomy Outreach Program at the University of British Columbia Energy in Cars 3 The relationship between energy (and hence fuel consumption) and velocity is: But if all other variables are held the same then: