Which of the following is true?

(a) If a car is traveling eastward, its acceleration is eastward.

(b) If a car is slowing down, its acceleration must be negative.

(c) A particle with constant acceleration can never stop and stay stopped

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SACHIN KUMARLv8

28 Nov 2020

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Two cars drive on a straight highway. At time t=0, car 1 passes mile marker 0 traveling due east with a speed of . At the same time, car 2 is 1.0 km east of mile marker 0 traveling at due west. Car 1 is speeding up with an acceleration of magnitude , and car 2 is slowing down with an acceleration of magnitude .

At what time do the cars pass next to one another?

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Suppose that a car traveling to the west ( -x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration along the x-axis is correct?

a) Its acceleration is negative but its velocity is positive

b) Its acceleration is positive, but its velocity is negative.

c) Both its acceleration and its velocity are positive.