A car is exiting the highway on a circular exit ramp.(See figure) highway E Lzer

Question

A car is exiting the highway on a circular exit ramp.(See figure) highway E Lzer the direction olf the cars doelerotionPpostedpeed mt, enters the exit ramo and then maintains a constant speed. When the car is at pointx on the rampwhich vector best represents O C. ? D. O E. O F O G. ??. O I: the acceleration is zero. After passing pont X but before reaching point ? the driver starts to push the brake pedal and apples the brakes for the rest of the exit ramp whch vector best represents the direction of the cars acceleration when the car is at point Y O C. G. 1: the acceleration is zero.

Explanation / Answer

1) Under constant speed the acceleration towards the center of the circle, so the acceleration will be at point X is directing towards center.

Therefore "H" pointing towards the center of the circle.

2) When the brakes were applied its velocity gets changed so it will have both tangential acceleration along direction of C, and centripetal acceleration along towards the center i.e point A..

Therefore Net acceleration directed towards B. Which is at Y.

Note: Answers are highlighted and underlined.

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