How does a car jump? (IMAGE) American Institute of Physics Caption As a car goes over a circular hill (subject to the normal force N, gravitational force mg, and frictional force f) is it most likely to lose contact with the road on the way up the hill, at the crest of the hill, or on the way back down the far side of the hill? How does your answer depend on the manner in which the car's speed does or does not change? Credit CREDIT: C.E. Mungan Usage Restrictions Journalists may use this image only with appropriate credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.