# a car initially travels north

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asked Sep 29, 2014

## 1 Answer

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A car initially travels north and then turns to the left along a circular curve. This causes a package on the seat of the car to slide toward the right side of the car. Which of the following is true about the net force on the package while it is sliding? 1. There is not enough force directed toward the center of the circle to keep the package from sliding. 2. There is not enough force directed north to keep the package from sliding. 3. The force is directed away from the center of the circle. 4. There is not enough force tangential to the car,s path to keep the package from sliding. 5. The force is directed north.

The car is in circular motion. If the box maintain same motion, the net force needs to point to the center of the circle and has the magnitude equal to $mv^2/r$. In this case, the static friction is not enough to provide the needed force to maintain its circular motion. So Choice (1).
answered Oct 1, 2014 by (21,750 points)